about this item INSTALLATION WITHOUT DRILLING: these magnetic mountings for fire detectors replace the complicated assembly of smoke detectors and fire detectors. There is no risk of touching cables. One side is self-adhesive, the other is magnetic QUICK SETUP: assembly of the smoke detector fire alarm bracket is done in 1 minute without any tools. Simply remove the adhesive film, stick the support to the ceiling and apply light pressure for 10 seconds for optimal ceiling attachment EXTRA STRONG ADHESIVE SURFACE: the self-adhesive surface of the adhesive magnet offers a very strong hold. Once in place, the smoke detector will not become uncontrollable EASY BATTERY CHANGE: you will no longer need tools for battery replacement or for smoke detector function tests. To remove the smoke detector, slide it sideways in relation to the element on the ceiling EASY TO HANDLE: you can simply paint the magnet holder holder without affecting its operation