Videx handset for VX2200 series systems.
3171 – 2 button, call tone handset  (Vx2200 audiophone)
This handset includes two push-buttons and an adjustable volume control switch. It has a door lock release and an auxiliary button which can be used to trigger other devices such as an electric lock or stair lighting.
 
Features
Auxiliary button
Electronic call tone
 
Base dimensions: : 85mm(W) x 218mm(H) x 55mm(D)