1)4'' HD Digital Video Door Phone System 2)Talkback in House 3)Take Pictures and Storage 4)Fashion Appearance Indoor Unit SpecificationScreen size:4”(4:3 display)Resolution: digital:320×3(RGB)×240Visual angle: up 60 degree, down 70 degree, left or right 75 degreeRingtone: chorded polyphonic ringtoneSensitivity: 56dbSignal system: PAL/NTSC (optional)Input voltage: AC 100V-240V~ 50Hz/60HzOverall ...
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