Product Specifications

DBS1A Intercom KIT includes DB1MD handset and DA1AS door station.
Features;

Supports up to 4 sub stations that can be added to the master
Call tone and volume control with mute indicator
All Call button for internal communication 
Talk button, handsfree communication 
Can communicate between the 5 stations via the all call button
Connects via 2 wires to DA series door station
Requres one 16v AC power supply  to operate both the unit and electric strike
Off button