7' LCD video door phone doorbell home security intercom for 3 families

Features:
This package includes 3 indoor monitors + 1 outdoor camera
Specially designed for 3 families, it absolutely can fully meet 2 families' needs
7' (16:9) TFT LCD screen
1/3' CMOS outdoor camera
High quality dual-way audio communication
Outdoor monitoring function
Do not disturb mode
Infrared night vision supported
Hands-free intercom
Electronically unlocking control
24 kinds of polyphonic chord ringtones
Low standby power consumption: <1.1W

Technical information:
Indoor monitor
Screen: 7' TFT LCD (16:9)
Resolution: 480 x 234 pixels
Brightness: 250cd/m^2
Standard: PAL/NTSC
Viewing angle: - approx. 50° (up)- approx. 70° (down, left, right)
Effective distance: -up to 200m (between indoor and outdoor unit)- up to 50m (between indoor and extra indoor unit)
Talkbacking time: 120sec ±10%
Monitoring time: 60sec ± 10%
Polyphonic chord ringtones: 16 types
Operating temperature: -10-50°C
Storage temperature: -30-80°C
Relative humidity: 10-90%
Microphone sensitivity: 56dB
Power supply: - input: AC 100-240V, 0.5A (worldwide voltage)- output: DC 15V, 1.2A
Dimensions: approx. 250 (W) x 150(H) x26 (D)mm
Installation method: wall-mounted

Outdoor camera
Image sensor: 1/3' CMOS
Standard: PAL/NTSC
Resolution: - 420TVL- PAL: 628 x 582 pixels- NTSC: 510 x 492 pixels
Focal length: 3.6mm
IR LED: 5pcs, 10 lux
Visual angle: approx. 66° (up, down)- approx 75° (left, right)
Gain control: auto
Infrared night vision distance: approx 4m/13ft
Operating temperature: -10-50°C
Storage temperature: -40-85°C
Power supply: DC 15V (directly powered by indoor monitor)
Dimensions: approx. 88 (W) x 180 (H) x 35 (D)mm
Dimensions (with rain cover): approx. 93 (W) x 185 (H) x 40 (D)mm
Installation method: wall-mounted

Included installation cables
Monitor to camera connection cable: 4-pin
Camera to lock connection cable: 2-pin

Item includes:
1 x indoor unit (monitor)
3 x DC 15V adapter
3 x 5m 4-core connection cable
1 x user's manual