Multi-family Building System 

Specifications
Wall monitor:
4.3" or 7" 2-wire  indoor monitor

Surface-mounted Multi-family Building System:
Power supply: via the monitor
Type - Viewing angle: C-MOS 72°
Night vision: Invisible infrared lighting
Color: Aluminium Silver(Metal)

Features
1) unlock the door with an IC Card or a tag
2) Waterproof
3) can be connected with possibly up to 6 families
4) can be tailored to meet your requirements