Aria Audio Technology P-0920 Front Door Intercom Controller For 1 Door

Works with the Channel Visionft. s IU and DP series door stations to create an elegant door intercom system. When the doorbell button is pressed the phones will ring. Simply answer the phone and you will be able to speak to the person at the door. Features: Distinctive telephone ring LED status indicators. RJ-45 connections for input and output.