The Omnikey HID OMNIKEY SE Plug (RDU55200-00-000000) is a professional smart card reader designed for secure authentication and access control applications. This compact USB device supports multiple smart card technologies such as HID iCLASS, MIFARE, and DESFire, providing versatile compatibility with various security systems. Measuring 65 mm in length, 40 mm in width, and 15 mm in height, the reader features a robust ABS plastic housing with integrated cable relief for reliable continuous operation. Weighing 85 g, this portable device offers plug-and-play functionality with a USB 2.0 interface and requires no external power supply. The OMNIKEY SE Plug supports contactless card reading up to 50 mm away and operates in a temperature range of 0 °C to 50 °C, making it suitable for various office and industrial environments. With integrated LED status indicators and acoustic feedback, users receive clear operational confirmation during card authentication processes. The reader is compatible with Windows, Linux, and macOS operating systems and includes comprehensive SDK support for custom application development. Designed for enterprise security systems, access control, time tracking, and logical access applications, this smart card reader meets international security standards and delivers reliable performance for professional use cases.