Audio/video communication
	7.0 "TFT LCD Color screen
	Watch door entrance
	Remote lock release
	Inter-call with extended phone set
	Optional for extended camera or extended monitors
	Optional extended panel for apartments more than 24 in a building

Data of Technology	Working Voltage: DC 15V
	Audio Communcation system:Duplex handset
	Maximum Wiring Distance:50m/165 feet(22AWG, 0.65mm 4 wire)
	Wiring: 4 wires
	Working Current: ≤400mA
	Communication duration: 45~90sec
	12oCVideo Signal: 1Vp-p 75Ω,PAL or NTSC