... RF module for integrating into existing devices 2. Multi-interface: RS232, RS485, USB, TTL, SPI, C&D, ABA1/2, ... Wiegand CN3XX(S)(T)-X 13.56MHz Reader moduleCN3XX(S)(T)-X Plug & Play OEM reader module ... adjust reading distance as optional.Customized service on module and antenna (size, position, etc) is ... (7) Testing tags (8) RS232-RS485 converter module Mini RF module with RS232, RS485, USB, TTL, SPI, C ...