Advanced Dual Frequency Technology: This RFID Card Reader Module operates at both 125kHz and 13.56MHz frequencies, ensuring compatibility with a wide range of RFID tags and systems. Versatile Connectivity: Equipped with Wiegand and UART TTL interfaces, this module offers flexible integration options with various access control systems and devices. Compact and Durable: Designed for reliability and ease of installation, the module's compact form factor makes it ideal for deployment in space-constrained environments. Color: Green Material: plastic Package Contents: 6 x Wiegand card reader module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.