This true universal PIR based Motion sensor is designed to sense movement inside a building. The Universal Motion sensor support up to 4 different mounting methods in one device; 1) Ceiling recessed in a flush-box. Using the round front cover plate; 2) Surface mounted screwed. Using the round cover plate + the surface mount adapter; 3) Surface mounted glued with adhesive tape. Using the round cover plate + the surface mount adapter; 4) Recessed in a flush-box in combination with a universal 55x55 mm WA frame. Using the 55x55mm cover plate . Power supply is provided either through a CR2450 battery or through mains power when battery-less installation is preferred. The multi-color LED indicates during daily operation when the battery is low and should be replaced or when any other corrective action might be necessary. The battery can be easily replaced without special tools (only a screw-driver is needed). The universal mounting methods and its power supply options makes it possible to fix (screw or glue) the Motion sensor on any location wherever you need it . Through the on-device programing buttons and the multi-color LED the detection settings; Light conditions, Turn-off delay and Sensitivity can be simple adjust to match the specific application requirement. All the settings can be carried out directly on the device, by removing the front cover which is fixed by magnets to the base module. Battery, adhesive tapes, both front cover plates and the surface mount adapter are included in the scope of delivery.