The GR-55 model detects any movement at a distance of 12 metres and an angle of 100 degrees, giving an output of 230V with a maximum load rating of 500W. It can be used to turn on the lights of house entrances, shop display lights, to open electrically operated doors or to switch or an appliances. The unit is activated by detecting the infrared radiation transmitted by moving objects. It is designed and manufactured in a way that every user can adjust it to his/her own needs.