Supply voltage DC15V 
 Quiescent current 120MA 
 The average consumption of 2W for 
 Audio signals of noise ratio is not less than 50DB 
 Ambient temperature -10 ~ 50 `C 
 40 ~ 95% humidity 
 Resolution 380/420TV Line 
 Installation dimensions 430mm (L) * 260mm (W) * 55mm (H) 


 200 alarm information can be saved, any read, the callback processing time 
 To accept any extension, the host cell door and wall unit call 
 Can unlock the door the host machine and the wall: Call any extension 
 The host or the door, opposite the call to achieve 
 RS485 bus with the door machine used for data communication