COMMAX 1-to-1 Door Phone This Commax 1-to-1 door phone security system package consists of 1 unit DR-201D (as door unit) and 1 unit DP-2S (as room unit). Door unit is typically installed n...
This Commax 1-to-1 door phone security system package consists
of 1 unit DR-201D (as door unit) and 1 unit DP-2S (as room unit).
Door unit is typically installed near the door. Room unit is typically installed inside a secured room.
