Sensor mounts to any frame behind drapes and blinds, so there is no worry about shadowing the sensor. Effective in harsh environments such as kitchens and laundry rooms even behind drapes and blinds Double detection glassbreak and forced opening Excellent false alarm immunity mouting bracket built in Alarm memory. Ideal for detection on sliding glass doors, picture windows and windows that open, kitchen windows, or large picture windows up to 10' (3 m) of range Ideal for occupied areas