... The intercom system including 7 inch TFT-LED screen indoor monitor and Angle Adjustable Big-eye Outdoor Station.2.Finger touch ... volume and talking volume adjustable.4.Outdoor station or indoor monitor with electric-controlled door release function.5.Two unlocking buttons to ... or 4 wires system available,easy installation.8.Aluminium alloy with angle adjustable camera in four directions:up, down, left ...