... RF module for integrating into existing devices 2. Multi-interface: RS232, RS485, USB, TTL, SPI, C&D, ABA1/2, Wiegand CN3XX ... ) SAM socket for enhanced security, expandable on request3. Multi-interface: RS232, RS485, USB 2.0, TTL, SPI, Clock & Data / ABA1,2 ... are for selection, with tuner to adjust reading distance as optional.Customized service on module and antenna (size, position, etc) is ...