オーディーユージャパン株式会社（ODU） List of Products and Services

The "ODU MINI-SNAP" is an ideal self-locking circular connector with a wide range of applications. It can be used for power, signals, data, and other media regardless of the transmission type, and it features a robust metal housing. Additionally, it employs a push-pull locking system. Once plugged in, it automatically locks into the receptacle, ensuring that the connector will not come loose even if the cable is pulled. 【Features】 ■ Applicable in a wide range of fields ■ Robust metal housing ■ Compact space-saving design ■ Push-pull system *For more details, please contact us or download the catalog.

The "ODU-MAC" is a compact modular connector system that can accommodate various types of transmission elements within a single connector. You can choose from modules for signals, power, high current, high voltage, coaxial, high-speed data transmission, optical fiber, and media such as air or fluids, and integrate them into one connector. You can select from two types: automatic or manual connection, both of which can be attached to a wide range of modules that provide various connections, so please choose according to your application. 【Features】 ■ More than 100,000 mating cycles ■ Docking frame for automatic connection ■ Robust housing for harsh environments and automatic connection ■ Easy housing locking with spindle or lever ■ Extremely compact due to high density For more details, please refer to the catalog or feel free to contact us.

The series is a round push-pull locking connector that can be used in various fields, including medical technology, measurement and testing, and the energy sector. It allows for quick and easy attachment and detachment, making blind mating possible. Additionally, it is designed to be space-saving. Furthermore, we also offer sterilizable options like the "ODU MEDI-SNAP" and high-density types such as "ODU AMC & ODU AMC," so please take a look at those as well. 【Features】 ■ Blind mating capability ■ Space-saving ■ Easy to clean ■ Clear locking status *For more details, please contact us or download the catalog.

This product is a round push-pull locking connector that allows for quick and easy attachment and detachment. It can be used in a wide range of fields, including medical technology, measurement and testing, energy sectors, and industrial electronics. It enables quick and easy attachment and detachment, while ensuring safe and reliable locking. Additionally, we offer a shielded type for EMC measures, so please feel free to contact us if you have any requests. 【Features】 ■ Usable in a wide range of fields ■ Space-saving ■ Safe and reliable locking ■ Shielded type for EMC measures available *For more details, please contact us or download the catalog.

This series is a push-pull round connector with a coating type using a latch-groove key. It boasts a long lifespan with over 5,000 mating cycles and is designed for various configurations. Please choose the optimal option from a wide range of sizes, connection methods, and inserts. 【Features】 ■ Coating type with latch-groove key ■ A wide variety of sizes available ■ Protection ratings IP 50/IP 68 ■ Over 5,000 mating cycles *For more details, please contact us or download the catalog.

The "MINI-MED series" is the optimal connector for scenarios requiring lightweight, space-saving, and waterproof cable assemblies. It provides safety and ease of handling for use in hygienic fields demanded by medical technology and other applications. Additionally, it is adopted in industrial devices such as electric bicycles and barcode scanners. It is also used in testing and measurement equipment, including conductivity meters and measurement sensors. 【Features】 ■ Good grip ■ Blind mating ■ Audible locking sound ■ Space-saving ■ One-stop plug and cable assembly *For more details, please request materials or view the PDF data available for download.

The "ODU MINI-SNAP (F Series)" is a round connector with a half-shell coding type and a metal housing featuring a push-pull locking mechanism. This round connector, with its robust metal housing, excels in performance even in demanding environments, regardless of power, signal, or data transmission. You can choose from a wide range of sizes, contact connection methods, and inserts, allowing for a diverse array of configurations. 【Features】 ■ Space-saving receptacle ■ Safe and sturdy locking system ■ Low insertion and extraction force ■ Can be attached and detached by robots ■ Easy housing cleaning *For more details, please refer to the PDF document or feel free to contact us.

The "ODU MINI-SNAP" is a hybrid circular connector that allows for quick and easy attachment and detachment through push-pull locking. It combines miniaturization, ease of installation, and efficient use of space, making it multifunctional and easy to handle. It is possible to integrate the transmission of a wide variety of media into a single interface. 【Features】 ■ Efficient one-time insertion and removal ■ High performance ■ Reliable quick connection technology, with push-pull locking capable of up to 5,000 mating cycles ■ Space-saving design ■ Reliability in harsh environments *For more details, please refer to the PDF document or feel free to contact us.

ODU connectors enable reliable transmission of media such as power, signals, data, gases, and fluids in various applications, including future-oriented growth markets like medical, military and security, energy technology, as well as established industrial electronics, measuring instruments, testing technologies, and automotive industry technologies. The product range includes a variety of connectors such as compact round push-pull connectors, rectangular modular connectors, cable assemblies, and overmolded connectors. We also offer waterproof connectors (IP68/69) and autoclave-compatible products for diverse applications. Customization is available, so please feel free to contact us. 【Business Description】 ■ Development and manufacturing of connectors For more details, please refer to our catalog or feel free to contact us.

The ODU MINI-SNAP is a one-touch push-pull connector with a robust metal housing. It supports various transmission types including power, signal, and data, and boasts a high durability with a mating cycle of 5000 times. ■ 6 different sizes (plug outer diameter from 6.4 mm) ■ 3 types of connection: solder / crimp / PCB ■ 2 - 40 poles: composite inserts available ■ Waterproof connectors available: IP68/IP69 compliant ■ Mismatch prevention feature with latch-groove coding *For more details, please refer to the ODU MINI-SNAP catalog.

The "ODU MEDI-SNAP Product Catalog" features easy-to-handle push-pull locking type connectors and compact round connectors with a breakaway type that can be instantly removed, which have undergone overmolding processing. It introduces "ODU MEDI-SNAP plastic housings," as well as "metal housings," tools, and various accessories. [Contents] ■ Product Information ■ Model Number Configuration ■ ODU MEDI-SNAP Plastic Housing ■ ODU MEDI-SNAP Metal Housing ■ Tools and Various Accessories, etc. *For more details, please refer to the PDF document or feel free to contact us.

The ODU AMC push-pull connector can be quickly locked with a small force (low insertion/extraction force) due to its push-pull design. Its compact size saves space. ■ Compact and lightweight ■ Detachable with a braid ■ Over 5000 mating cycles ■ 360° shielded structure ■ Supports high-speed data transmission ■ Mechanical/color coding ■ Robust housing with a non-reflective surface *For more details, please contact us or download the catalog.*

The ODU AMC Breakaway Connector is designed as a connector that can be instantly attached and detached in the field. ■ Compact and lightweight ■ Can be attached and detached with a blind connection ■ Over 5000 attachment and detachment cycles ■ 360° shielded structure ■ Supports high-speed data transmission ■ Mechanical/color coding ■ Robust housing with a non-reflective surface ■ Waterproof connectors available: IP68 / IP69K ■ Can integrate signals, voltage, and coaxial into a single connector *For more details, please contact us or download the catalog.*

The ODU MINI-MED features an easy-to-remove design and is equipped with a breakaway function that allows for quick disconnection of the plug and receptacle. This safe and user-friendly solution is suitable for fields such as healthcare, where hygiene is essential. Additionally, its compact size makes it usable in industrial electronics and testing and measurement applications. ■ 2 - 6 pole dustproof ■ Waterproof protection rating: IP67 (when mated) ■ DEHP-free ■ ETO (ethylene oxide) sterilizable ■ PVC cable operating temperature range: -15°C to +80°C ■ Space-saving ■ Lightweight ■ Over 1000 mating cycles ■ Gold-plated contacts (for solder connections) ■ Breakaway function ■ Blind mating

ODU AMC is a connector solution for next-generation defense applications. ■ Lightweight and compact ■ Can be connected and disconnected blind ■ Over 5000 connection cycles ■ 360° shielded structure ■ Capable of data transmission up to 10 Gbit/s ■ Provides system solutions including cable assembly and overmolding *For more details, please refer to the pages of each lineup.

ODU MEDI-SNAP is a connector with a lightweight resin housing. Its space-saving design allows it to maintain high performance even in small assembly spaces. With reliable coding, it can withstand over 2000 insertions and removals. ■ Two sizes available (plug outer diameters 13.7/18.5 mm) ■ Three connection types: solder / crimp / PCB ■ 2-26: composite insert available ■ Protection rating: up to IP67 ■ Seven color coding options ■ Six mechanical coding options ■ Compatible with autoclave and complete sterilization ■ Metal types are also available *For more details, please contact us or download the catalog.

The connectors and reliable connector technology provided by ODU, which have reached the highest standards of precision, can be utilized in various medical fields such as hospitals, physicians' and dentists' offices, and home healthcare. This case study collection introduces various application examples of ODU connectors in the medical field. [Application Examples] - Connectors that connect MRI systems and coils - MRI-compatible patient monitors - Mobile X-ray devices - Microscopes for neurosurgery - Inhalers, among others *For more details, please refer to the PDF document or feel free to contact us.

The ODU AMC EasyClean is a flat-designed connector that allows for quick and easy cleaning of connectors in the field. It features a robust structure that can withstand harsh environments such as snow, dust, and mud. Extremely lightweight and compact, it allows for blind mating and is used in soldiers' field radios, portable computers, night vision systems, and unmanned aerial vehicles. ■ Compact and lightweight ■ Blind mating capability ■ High durability: over 5000 mating cycles ■ 360° shielding ■ 7-19 poles ■ Waterproof connectors available: IP68 / IP69K ■ Non-reflective surface ■ Two types of connection: solder / PCB board

German-made high-reliability connectors provide an ideal interface for high quality and high reliability, regardless of power, signal, data, or fluid. The trend towards miniaturization continues in medical technology, consumer electronics, and automotive technology. They are also offered as complete systems, including assembly. 【Product Examples】 ■ Round push-pull connectors ■ Resin type round push-pull connectors ■ High-density type connectors ■ Modular connector systems ■ German-made high-reliability connectors *If you would like a comprehensive catalog, please request materials or view the PDF data from the download.

The "MINI-MED" is a resin connector that features a breakaway function for easy attachment and detachment, allowing for quick removal of the plug and (inline) receptacle. This solution provides safety and ease of handling for use in hygienic fields required in medical technology and other areas. We are currently offering a free catalog. 【Features】 ■ 2 to 6 poles ■ Over 1000 attachment and detachment cycles ■ Protection rating IP67 when mated ■ Pins are gold-plated and soldered ■ DEHP-free For more details, please refer to the product overview or feel free to contact us.

The "MINI-SNAP PC" is a high-quality push-pull connector suitable for applications with many stringent requirements, such as in the medical field. With the right combination, it achieves IP67, contact protection, and shielding. It is possible to consolidate these features into an extremely compact connector. We are currently offering a free catalog. 【Features】 ■ Quick and easy connection and disconnection ■ Blind mating capability ■ Space-saving design ■ Lock status easily identifiable at a glance ■ Protection ratings IP50, IP67 For more details, please refer to the product overview or feel free to contact us.

The "ODU AMC High-Density Type" is a one-touch push-pull circular connector that proves it is possible to achieve a compact design and high quality simultaneously. With the breakaway feature, the connector can be easily detached by pulling on the cable. This allows for instant connection and disconnection of the connector. We are currently offering a free catalog. 【Features】 ■ Maximum number of connections: 40 contacts (size 1.5) ■ Salt spray resistance ■ MIL standard compliant ■ Waterproof (IP 68) ■ Maximum number of mating cycles: 5,000 For more details, please refer to the product overview or feel free to contact us.

The "ODU AMC" is a round connector designed for military, defense, and security applications, featuring a highly robust metal housing. Its characteristics of being sturdy, waterproof, and easy to clean are exceptionally demonstrated even in harsh field environments. We are currently offering a free catalog. 【Features】 ■ Push-pull locking/breakaway function ■ Lightweight, compact, and can be connected/disconnected blind ■ Operating temperature range: -51°C to +125°C ■ Mechanical coding and color coding available ■ Over 5,000 mating cycles For more details, please refer to the product overview or feel free to contact us.

The "ODU MEDI-SNAP" is an economical resin overmolding connector that achieves over 2,000 safe insertions and removals. Its space-saving design allows it to maintain high performance even in small assembly spaces. Furthermore, by using resin, it has been lightened to three-quarters the weight of traditional metal connectors. We are currently offering this catalog for free. 【Features】 ■ Lightweight: Three-quarters the weight of traditional metal connectors ■ Easy assembly, low maintenance ■ Space-saving design ■ High chemical resistance ■ Quick mating with push-pull locking ■ Compliant with IEC 60601–1 (up to 2MOPP / 2MOOP) For more details, please refer to the product overview or feel free to contact us.

The "ODU MINI-SNAP" is a compact connector that can be used in various applications such as industrial electronics and testing and measurement fields. The robust metal housing round connector provides excellent quality, high reliability, and top performance, regardless of the transmission medium, including power, signals, data, and fluids. We are currently offering a free catalog. 【Features】 ■ Can integrate a wide variety of transmission media into a single interface ■ Up to 5,000 mating cycles ■ Reliable quick connection technology ■ Space-saving design ■ Customized solutions for other requests For more details, please refer to the product overview or feel free to contact us.

The "ODU MINI-SNAP (F Series)" is a coding type with a half-shell design, making it an ideal connector for situations where visual connection and disconnection is difficult. You can choose from a wide range of sizes, contact connection methods, and inserts. We are currently offering a free catalog. 【Features】 ■ Quick and easy connection and disconnection with locking ■ Blind connection and disconnection (easily possible even in narrow assembly spaces) ■ Space-saving receptacle ■ Safe and robust locking system ■ Low insertion and extraction force For more details, please refer to the product overview or feel free to contact us.

The "ODU MINI-SNAP (L, K, B series)" is a round push-pull connector with a coding type using a metal housing and a latch-groove key. It is available in a waterproof type with an IP68 protection rating, and various types of inserts are offered. We are currently offering a free catalog. 【Features】 ■ Quick and easy attachment and detachment ■ Attachment and detachment without relying on visual cues ■ Compact space-saving design ■ Safe and robust locking system ■ Detachment by robots is also possible For more details, please refer to the product overview or feel free to contact us.

ODU Group is a company headquartered in Germany that manufactures connectors. It has 12 branches worldwide, with manufacturing sites in Germany, China, Romania, Mexico, and the United States. We provide a diverse range of connector solutions to meet a wide variety of needs, regardless of power, signal, data, or media transmission. Our company consistently offers ideal interfaces based on proven quality and reliability. 【Product Lineup (Excerpt)】 ■ Compact modular connector systems ■ Push-pull circular connectors ■ Single contacts ■ Connectors for printed circuit boards ■ Heavy-duty connectors For more details, please refer to our company introduction or feel free to contact us.

ODU connectors have a proven track record of being used in a wide range of medical applications. Reliable and robust components are required in medical practices and portable use, such as in electrocardiogram measurements and outpatient surgical table systems. ODU connectors are well-suited for these critical applications. We are currently offering a free catalog that includes information on ODU's certifications and standards, product materials, specifications, applications, and major delivery destinations. 【Certifications and Standards (Excerpt)】 ■DIN EN ISO 9001 (Quality Management System) ■DIN EN ISO 14001 (Environmental Management System) ■ISO 13485 (Quality Assurance for Medical Devices) ■DIN ISO TS 16949 (Quality Management System for the Automotive Industry) ■Meets global standards such as UL and VDE *For more details, please refer to the PDF document or feel free to contact us.

The series is a round push-pull locking connector offered by ODU, which specializes in the design and manufacturing of high-performance connector solutions and cable assemblies. It features a wide range of products, including the robust metal housing type "ODU MINI-SNAP," the sterilizable "ODU MEDI-SNAP," and the military-grade high-density connector "ODU AMC." We are currently offering free catalogs. 【Features (ODU MINI-SNAP)】 ■ Quick and easy attachment and detachment ■ Can be attached and detached blind ■ Safe and reliable locking ■ Easy to clean ■ High-density electrodes *For more details, please refer to the PDF materials or feel free to contact us.

The "ODU MINI-MED" is an over-molded resin connector suitable for scenes where lightweight, space-saving, and waterproof cable assemblies are required. It features an easy-to-use breakaway function that allows for quick disconnection of the plug and receptacle or inline receptacle. A free catalog is currently available. 【Features】 ■ 2 to 6 poles ■ More than 1000 mating cycles ■ Protection rating IP 67 when mated ■ Pins are gold-plated and soldered ■ DEHP-free *For more details, please refer to the PDF document or feel free to contact us.

With a customer-first philosophy and high technical capabilities, ODU has established its position as a leading company in connectors. ODU's connectors enable reliable transmission of a wide variety of media such as power, signals, high-speed data, and fluids in various applications, including future-oriented growth markets like medical technology, defense and security technology, and energy technology, as well as established sectors like industrial electronics, test and measurement technology, and automotive industry technology. For more details, please refer to the PDF available for download. 【Contents】 ■Problem-solving and development capabilities ■ODU's contact technology ■ODU's machining technology ■ODU's surface treatment technology ■ODU's high-speed data technology ■ODU's high-voltage connectors ■Electromagnetic compatibility ■High-pressure and high-vacuum applications ■Flexible wiring technology ■Cable assembly ■ODU's testing processes

We introduce ODU's problem-solving and development capabilities. Our connectors and connector systems serve as benchmarks for mating cycles, contact density, and reliability. On the other hand, the custom solutions we develop for each customer's application are adopted worldwide. With decades of experience and a dual approach of simulation programs and testing/manufacturing processes, we can develop custom connectors in a short period. [Features] ■ Custom solutions are adopted worldwide ■ Custom connectors can be developed in a short period ■ Development and manufacturing bases in Europe, America, and China ■ Strengthening collaboration with customers to provide the necessary expertise for each site *For more details, please refer to the PDF document or feel free to contact us.

At ODU, we have successfully incorporated two types of metal machining—stamping (stamping bending) and cutting processing—which are particularly important for connector manufacturing, for decades. We can accommodate not only large orders but also orders starting from just one piece. In either case, one of our strengths is our ability to deliver a wide variety of products in a short lead time. Additionally, we manufacture a diverse range of components that make up the connectors using machinery. Approximately 13,000 types of components are produced using over 100 machines equipped with our unique technology and specially developed high-performance equipment. Thanks to our machining technology, the dimensions and designs of the contacts, housings, and housing components are always strictly adhered to. 【Features】 ■ Supports stamping (stamping bending) processing and cutting processing ■ Accommodates orders starting from one piece as well as large orders ■ Delivers a wide variety of products in a short lead time ■ Reliable flexibility and speed *For more details, please refer to the PDF document or feel free to contact us.

By applying surface treatments tailored to individual applications to contacts that have been machined and stamped, electrical and mechanical properties are imparted. Various characteristics such as contact resistance and wear resistance are achieved through a multilayer structure that is plated onto the base part. This is also true for metal housings that often require resistance to chemicals, seawater, and air pollution. ODU guarantees high-quality surface treatments specially designed for individual applications through surface treatment technologies integrated at an early stage of development and manufacturing. *For more details, please refer to the PDF document or feel free to contact us.*

There is a rapidly increasing demand for data transmission connectors that can handle vast amounts of data transmission while also meeting both electrical and mechanical characteristics. Our expertise—particularly in selecting suitable materials at an early stage and testing S-parameters—enables stable, high-quality transmission. Additionally, we offer ODU's high-speed connectors as custom types tailored to individual applications. For example, we can accommodate requests for high density, more frequent connect/disconnect cycles, high durability, lightweight design, and vibration resistance. 【Features】 ■ Selection of suitable materials at an early stage ■ Testing of S-parameters ■ Capability for stable, high-quality transmission ■ Custom types according to individual applications *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce ODU's "High Voltage Connectors." The requirements for the development and design of high voltage connectors include the design of insulators that respond to the need for miniaturization while considering interference between contacts. To achieve continuous conduction of high voltage in a compact connector, it is essential to ensure appropriate spatial and creepage distances. Furthermore, it is important to prevent irregularities such as edges and corners in the product design. This is because if there are irregularities in the contacts that are arranged at regular intervals, the electric field strength may increase several times. The combination of materials can also exacerbate the electric field strength. Additionally, we also consider another important parameter, "partial discharge." *For more details, please refer to the PDF document or feel free to contact us.*

Electromagnetic compatibility (EMC) is a condition that should be considered in various applications and is generally a solution suitable for applications characterized by fixed connectors or a low number of mating cycles. However, the design of EMC shielded connectors used in products that require a high number of mating cycles and have advanced mechanical specifications is a significant challenge. ODU systematically addresses these various challenges. In other words, we consolidate the necessary manufacturing know-how and expertise and apply them to individual issues. Our foundational knowledge has been compiled into a database through decades of experience and is used in the development of the ODU EMC solution matrix. 3D CAD simulations also make the most of this empirical data. ODU connectors with EMC shielding are valued in fields that require error-free electronics, including the automotive sector, defense and security, medical diagnostic devices, and general data transmission technology. *For more details, please refer to the PDF materials or feel free to contact us.*

ODU has the expertise necessary for the development and manufacturing of connectors with airtightness or pressure resistance. The foundation of connector development includes specialized knowledge about materials, selection of sealing methods suitable for applications, operation of various sealing technologies, comprehensive analysis using Finite Element Method (FEM), and experience-based know-how. There are various reasons why airtightness or waterproofing is required for connectors and their systems. For example, in equipment that uses high-pressure washers, waterproof connectors with protection rating IP 69K are necessary to maintain the functionality of the equipment over a long period. In the railway sector, waterproof connectors rated IP 69K are required to prevent degradation of functionality over time. Our connectors enable safe connections in high-pressure, high-vacuum, and waterproof applications. *For more details, please refer to the PDF materials or feel free to contact us.

Wiring of connectors tends to be overlooked compared to the performance and functionality of the connector system. However, when considering both thermal flow and current, the section from the connector to the cable becomes extremely important. ODU has the experience and expertise to suppress aging degradation in the wiring section that limits performance and to develop and manufacture reliable solutions. Our wiring types mainly consist of three types: screw-type, solder, and crimp connections. Solder and crimp connections are commonly used on the cable side. Crimping is particularly used in applications that require safety. *For more details, please refer to the PDF materials or feel free to contact us.*

To support applications such as high current, electromagnetic compatibility (EMC), high temperature, and airtightness, we believe that simply providing high-quality connectors and leaving the wiring and cable assembly to the customer is not sufficient service. Wiring and cables significantly influence the overall performance of the system. Therefore, a perfect contact system requires optimal collaboration between contacts, wiring technology, and cable assembly. To ensure this, ODU accurately identifies factors that may affect the characteristics of the system and provides comprehensive solutions that take these into account. Using finite element method (FEM) simulations, we examine the product functions specified by the customer early in the verification process. *For more details, please refer to the PDF materials or feel free to contact us.*

Let me introduce you to the ODU testing process. "Functionality," "reliability," "quality," and "safety" are key concepts in connectors and their systems. Achieving these requires a deep understanding of fundamental physical phenomena. Additionally, it is crucial to continuously confirm and verify the mechanical and electrical properties of products through various certification tests in the development and design process, as well as thorough quality control in the manufacturing process. ODU's in-house Technical Testing Center (T2C) is responsible for both the verification of standard values according to applications and the development and application of various testing methods. This dual function of the T2C establishes a knowledge base that is essential for further technological development of connectors and connector systems. *For more details, please refer to the PDF materials or feel free to contact us.*

This document explains connectors and wires. It includes how to connect connectors and wires, representative connection methods and their features, as well as solder connections, crimp connections, and more. It also introduces troublesome rules regarding wire sizes and the negative effects of pulling wires. 【Contents (Excerpt)】 ■1. How to connect connectors and wires - Representative connection methods and features of wires and connectors ■2. Solder connections ■3. Crimp connections ■4. ODU's crimping *For more details, please refer to the PDF document or feel free to contact us.

This document explains connectors and heat generation. It covers the mechanism of heat generation when electricity flows, as well as the temperature of connectors and their rated current. We hope that people with detailed knowledge, as well as those who are not usually involved with connectors, can enjoy learning about them. 【Contents (excerpt)】 ■1. The mechanism of heat generation when electricity flows 　・Column 1: Heating of electric heaters and air conditioners 　・Column 2: Superconductivity ■2. Temperature of connectors (heat generation and dissipation) ■3. Rated current *For more details, please refer to the PDF document or feel free to contact us.

Isn't it true that there isn't a day when we don't touch connectors such as plugs, USBs, LANs, and smartphone charging cables? A connector is a device used to transmit electricity, but how does electricity actually flow? In this document, I would like to briefly explain that mechanism. 【Contents (excerpt)】 ■1. The mechanism of electricity transmission through connectors ■2. Things that hinder the flow of electricity 　(a) Irregularities on the surface of metals 　(b) Insulating coatings on metal surfaces ■3. Defeating the hindrances 　(a) What can be done to eliminate irregularities on the metal surface? 　(b) What can be done about the insulating coating on the metal surface? *For more details, please refer to the PDF document or feel free to contact us.