Video Door Phone for Multi-Apartment (ASK310CQ7-1n)

ASK311-1n system video door phone is for multi-apartment. Very easy installation, good security products for your modern life.
Outdoor camera:
Metal case, 6LED lights, night vision. CMOS or color Sharp CCD sensor. (1/3 CCD, 1/4 CMOS)
Black and white or color for option. Calling the indoor phone
One button can connect one residence(a family), and two buttons can connect two families etc.
One button can connect with one monitor, two monitors or three monitors(optional)
Very easy installation
Dimension: 276*122*43(mm)

Technical parameter
Camera: 1/3CCD 1/4CMOS
Resolution: 420lines 380 lines
Illumination: 0.02lux 0.1lux
Standby: ≤ 60 MA
Current for unlock: ≤ 2000MA
Working Voltage: DC9V~15V
Working Temperature: -10° ~60°
Wiring: The 4-wire is used for connecting the monitor, the 2-wire is used for connecting the electronic lock. The connection between the monitor, please use 5-wire.
The maximum wiring distance is 50m/165 feet (22AWG. 0.65MM 4-wire)

Ndoor phone:
7 inch TFT screen, touch pad.
Very clear image and voice.
Wired and handfree,
Intercom and communicate between the monitors but no images
Unlock the electronic controlled door lock.
Brightness, volume and contrast adjustable.
Monitoring the outside.
16-chord melody rings for option
Surface mounted
Resolution: 800*480
Dimension: 237*157*24(mm)