The motion sensor ⁄ presence detector KINASGARD® RBWF detects the presence of persons and movements and has a switching contact as an output. The sensor detects motions over an aperture angle of 110° and a perimeter of 360°. The patented lens system with 20 individual lenses results in only very small dark areas that are only a few centimetres wide even at a distance of 10 m, thereby reliably detecting small movements. Elegant enclosure made of plastic with snap-on lid, base with 4-hole attachment for installation on vertically or horizontally installed in-wall flush boxes, with predetermined breaking point for on-wall cable entry. The room motion detector is used for monitoring and detecting statuses, and for motion-dependent control of room functions, e.g. for lowering the temperature in unused rooms, as a motion detector. The residential room motion detector is installed in corridors, in industrial halls, in offices, in residential rooms and business facilities.