Huge saving B/ W 4 inch video intercom door phone

4" B/ W Video doorphone

Popular design!
Easy used and operation!

Power: AC 110V-250V
Screen: 4" Flat CRT
Resolution: 420TVL
Operation Temperature: -20 - + 60
External Dimension:
255( L) * 190( W) * 62( H) mm
Installation: Surface-mount
Match way: one outdoor camera to one indoor monitor, one outdoor camera to two indoor monitor, two to one, two to two, two to three.
Wired Connection: 4wired