Ezviz CSDP1C Manual De Instrucciones página 17

Mounting Hole
If you already have a peephole, install the device in the same
place. If not, please drill a hole of diameter about 18mm and
about 145cm distance from the ground to have a good viewing
effect.
Measure the door's
thickness and select the
appropriate screws.
Thickness
35 to 60mm
60 to 95mm
95 to 105mm
3
Screw