... Mini 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 ... reading distance as optional.Customized service on module and antenna (size, position, etc) ... (8) RS232-RS485 converter module Mini RF module with RS232, RS485, USB, TTL, SPI, C & D, ABA1/ ...