This is a simple mount for the Reolink E1, which fits into European sockets (type F and C) using the plug supplied. The holes are designed for M3 inserts, onto which the mounting plate supplied by Reolink can then be mounted. V2: Here, I have rotated the holes by 90° so that the cable is not visible.

P.S.: Take a look at my cat ears for the E1 too.