Functions:	Video/audio communication with door staton
	7' ' color TFT LCD
	Watch the entrance
	Remote door 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: 110V~ 220V
	Working current: < 400mA
	Wiring: 4wires
	Ambient Humidity: 45%~95%
	Resolution: 420(W)*380(H)
	Video Output: 15625Hz 1Vp-p 75Ω, PAL or NTSC
	Installation method: surface mounting type