The ZKTeco CR20E RFID Card Reader is a compact, USB-based proximity card reader designed for smooth integration with access control and time attendance systems. It supports 125 kHz EM cards with a read range of up to 5 cm, making it reliable for quick and accurate identification. Built with durable ABS and PC materials, the reader features a sleek finish, dual LED indicators (red and green), and a built-in beeper to provide clear feedback during use. Powered directly through a USB connection, it offers true plug-and-play functionality without the need for external drivers. The CR20E is compatible with a wide range of ZKTeco platforms such as ZKBioAccess, ZKBioTime, and ATLAS, ensuring easy deployment across different applications. Compact and lightweight, it measures 117 × 66 × 17 mm and weighs only 120 g, while its operating range spans from –10 °C to +70 °C with humidity tolerance from 10 % to 90 %, making it suitable for diverse environments.