Introduction:
* Intercom, nightvisiable, Unlocking，monitoring, can 1 VS 1-4
* Over 30 styles

Outside machine:
* Len: CMOS,0.3 mage pixels
* Waterproof: yes
* Code: option
* Distance: support 100M
* Power: DC15V/1A

Inside machine:
* Screen: TFT,7 inch
* DPI: 640*480
* Size: 240*150*26mm
* Power: DC15V/1A

Connection:
* Line: RVV4
* 1 VS 2-4, need vedio distributor