The SG8500 belongs to the SG-series of 'touch-free' or contactless switches activated by motion. They are typically deployed in installations with high sanitation or hygiene requirements, such as hospitals, clean rooms, food factories, pharmaceautical labs and bio-chemical laboratories. Come by our Youtube channel to check out its benefits and use cases! https://youtu.be/DQKNAg0eKjo This product has reached end of life. A direct alternative with better sensitivity and lower emissions is the SG8800.