Relays that may be needed can be purchased at the link/Products/Automation/Programmable-Relays/in the UNISET online store.
Stroobes in the walls
For walls, it is necessary to stock up in advance with a powerful perforator with a set of necessary nozzles for stroke of concrete, shock long drills of 22 or 26 mm in diameter and crowns specifically for the installation of dose boxes and sockets. You can use a grinder with a concrete disk, but although the work will be done faster, there will be much more dust. It is advisable to do this in protective glasses and a good respirator.