Peephole Size: φ5.8 1.3cm/φ2.28 0.51in. Peephole Weight: 27g/0.94oz. 1 Peephole. In -on mode, you can press " " to takes photo too. The screen supports display. When no rings the doorbell outside the door, the owner needs to press the button in the middle of the screen to check the situation at the door.
eBay