Wires 16 Buttons Direct-call Audio Intercom System 2 wire audio intercom system

Wires 16 Buttons Direct-call Audio Intercom System Product Description: Audio door phone Flush Mounting Easy wiring and installation Can Unlock the Outdoor station Connect: 2 wires Specifications: 2 Wires Audio 16 buttons Direct-call Outdoor Station Basic Functions:Call indoor phone and Intercom /Support Electric lock-control function ID card function is optional Power: DC12V(One system only need one power supply) Maximum Transmitting distance:100 meters Connetion cable:From