MODEL : DPV-4HP2 B/W VIDEO DOOR PHONE

4 inch flat B & W monitor  
Surface Mount with wall bracket
Visitor monitoring
Talk/Listen to visitor
Door Release (At Camera rear)
4-Wires to camera, Power AC 230v input

MODEL NAME: DRC-40BS

Surface Mount, Alum silver case
Weather-proof, outdoor use
Adjustable View Angle up-down
Temperature: -10 ~ 50 C
Door release terminals