12V AC buzzer type telephone with lock release key and additional button
Urmet 1130/11 Audio Handset
The Urmet 1130/11 Audio Handset is a 12V AC buzzer type telephone with a lock release key and an additional button.
This unit is used in older 12vAC call tone systems.
Used on 4+n doorphone systems or video doorphone systems with coax cab;le.