it suitable for a villa with two doors and three main rooms
2. The door which need to be released  can be unlocked from any indoor units
3. Two doors can be monitored from any indoor unit.
4. Camera of outdoor unit is adjustable in four directions:up,down,left and right for best view.
5. Waterproof aluminum alloy panel of the outdoor unit.
6. Raincover for the outdoor unit is available.
7. Night vision
8. 7"TFT  display is with high definition ,low power consumption ,no radiation
9. Hands-free intercommunication
10.Electric-controlled unlocking function
11.Monitoring the outdoors
12.8 different chord melodies for option
13.Adjustable chroma and brightness
14.Adjustalbe volume of melodies and intercommunication
15.Enclosed 15m cable and  an adapter for DIY
16.Slim fit designed aluminum alloyed indoor unit to enrich the fashionable and luxurious life