door bell

Smart Peephole Viewer Visual Doorbell

1.Indoor-part Dimension:136x75x18mm

2.Outdoor-part Dimension:60x60x15.5mm

3.Door hole range:15mm-58mm

4.Door thickness range:35mm-105mm

5.Battery:3 AA batteries (recommend energy alkaline batteries)

6.Voltage:4.5V-3.5V


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