When the module is installed, it is recommended to stick the antenna on the side wall of the plastic flush-mounting box and to keep it parallel to the wall; if the switch bracket is made of plastic, it is recommended that the antenna be no more than 10 mm from the wall; if the switch bracket is metal, it is recommended that the antenna be more than 15mm from the wall (metal bracket); moreover, the antenna should be as far as possible from the module and the power cable (the recommended distance is more than 15 mm).
If it is installed in a metal box, it is recommended to install the antenna on the plastic switch, but it requires sufficient space on it.
If it is installed on the ceiling or inside the light, the antenna should avoid being stuck on the metal, and also should avoid too much shielding.