Infrared detector via radio 433-80plus. Range 12m, 86º, 9 curtains. Pet immunity. Compatible with Zerowire and Xgen control panels. Mirrored optics that provide a dense coverage pattern. Selectable coverage pattern using mirror masks. Full drag underneath detection. Immunity to false alarms through "5D" signal processing. No adjustment is necessary for different mounting heights. Tolerates a deviation in the angle of the wall. End-user friendly design for battery change. 5 year life from a battery. Standard or double curtain sensing mode. Mounting height: 1.8 to 3 m. Frequency: 433.65 MHZ. Powered by a 3V CR123 battery. Dimensions: 130 x 69 x 53mm.