Features: 
For 4 users 
Changeable name-plate design 
Super slim and Aluminum alloy case 
Pinhole CCD camera with infrared LED compensation 

Specifications: 
Voltage Input: +DC12V(supplied by the door phone) 
Standby Current: ≤ 50mA 
Working Current: ≤ 160mA 
Working Environment: -20º C~+50º C 
Humidity: 45%~85% 
Image Device: 1/3" Sony SHAD CCD 
H. Resolution: 420TV lines 
S/N Ratio: >48dB 
Min Illumination: 0.5 Lux at F1.2 
System Wire RVV3× 0.5mm(distance ≤ 50m) 
RVV3× 1.0mm(distance ≤ 100m) 
Video Cable: 75-3 (distance ≤ 50m) 
75-5 (distance ≤ 100m) 
Unlock Delay Time: 6 Seconds 
Dimension: 132× 115× 30mm