Four-wire Connecting 4 Inch Black and White Visual Doorbell

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Villa-type hand-held black and white video interphone
Four-wire connection
Wall-mounted, wiring simple, easy to install
It can be connected to the image store
Easy to use & maintenance
Visitor calls, hands-free
Visual two-way intercom
Unlocking, monitor
Manual deterrent alarm
IR night vision
Diphonia ringback
Time-lapse auto power-off
Support audio / video output
Power supply: AC110V ~ 240V
Standby power / Work power: < 0.5W / ≦ 10W
Receiver sensitivity: -60DB + / - 4%
Video input / output: 1Vp-p / 1Vp-p, 75Ω
Display: 4 inch black and white super A flat tube
Resolution( H x V ): 480 x 234
Audio frequency response: 500-3000HZ
Operating temperature: -15 degree to +50 degree
The timing of surveillance / intercom: 1 minute / 2 minutes
Overall dimensions:
- Indoor unit( L x W x H ): 225 x 190 x 62 mm
- Gate machine( L x W x H ): 160 x 70 x 26mm
Ringing mode: diphonia "ding-dong" sound
Matching methods: one to one, one to two
Approved: CE / FCC

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