STYRBAR Wall Mount is a mount for IKEA's STYRBAR smart home remote control, designed to easily replace the normal light switch location. This model has holes to mount it on the standard 'Unterputzdose' (~built-in box). And because ours is crooked in the wall, the vertical holes are slits.
Originally I planned to have magnets glued to hold the remote, but in the end I just mounted the original remote control holder in the PCB.