·Single household system video inter-phone
·Screen: flat tube 4-inch CRT B/W
·Resolution: 420 lines
·2 lines connecting simply
·Visitor calling, video intercom, unlock, monitor
·With hand-move warn threaten function
·With prevent demolish alarm
·It can connect image memory
·Auto fixed time off of the picture
·Auto economize power control
·Power Supply: DC 14V-18V
·Waiting state consumption: < 0.5W
·Working state consumption: < 10W
·Video input: 1V p-p
·Calling shown on the picture time: 30 seconds
·Pick up handset shown on the time: 60 seconds
·Chime: double dingdong chime
·Sound sensor: -62dB +/- 4%
·Audio frequency: 500-3,000Hz
·Audio output: 75dB max
·Operation temperature: -15～+50 deg. C
·Installation: wall-mounted
·External dimensions:
     Monitor: 225(L)x170(W)x52(H)mm
    Camera: 132(L)x80(W)x22.4(H)mm