Press switch when the door bell is ringing, visitor's image will be displayed on TFT screen, it will continue in10 seconds, and then shut off automatically.. If the battery is on lower voltage, the screen will display a flash imaging to remind you to change the battery. Specifications: 1.Size:105X50X26mm 2.Battery:rechargeable Li-on 3.7V,850mAh 3.Adaptor:Input AC100V-240v 50Hz/60Hz, Output DC5.0V, 700mA 4.Camera:CMOS, 300,000 pixels 5.Display:1.5" TFT LCD
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