This combination of motion detectors and acoustic sensors (Indoor 180-R/T/TR) is both innovative and unique. The automatic light switch LUXOMAT^® Indoor 180 saves energy by switching on light as and when it is needed, both in private and commercial applications. Stairways, corridors, entrance areas, kitchens and toilets in apartments, houses, restaurants, hotels, offices and hospitals are ideal examples of use. The IP54 version of LUXOMAT^® Indoor 180 can also be used for damp areas such as cellar steps or garages. This switching combination rules out the possibility of accidental activation by external noise. Readiness for use is set individually using an integrated photoelectric switch, satisfying personal needs and all tastes!