Features: 1.Support Protocol: The RFID reader module supports the standard ISO, IEC14443A protocol, professional manufacturing, high performance. 2.Communication Methods: The module supports 3 kind of communication methods, include USB, UART, TTL, and RS232, to meet different needs. 3.Fast Card Reading: The working frequency is 13.56mhz, the induction distance is about 0?5cm, fast card reading time, about 0.2s. 4.PCB Material: The IC reader module is made of selected PCB materials, reliable in use. The main board has a micro USB communication interface. 5.Suitable for DIY Card Reader: The card reader module is a low voltage, small size contactless card reader module, suitable for DIY production. Specification: Item Type: Card Reader Module_x000D_ Material: PCB_x000D_ Applicable Card: IC card_x000D_ Induction Distance: Approx. 0-5cm/0-2in_x000D_ Working Frequency: 13.56MHZ_x000D_ Card Reading Time: 0.2s_x000D_ Support Protocol: Standard ISO, IEC14443A protocol_x000D_ Communication Method: USB, UART TTL, RS232 PackageList: 1 x Module Note: Do not place the product in an environment that is too humid and high temperature!