IR Detector. Fresnel optic. Anti-pets. Range 16 x 22 m. Selectable pet immunity. Double temperature compensation. Opening tamper and take off. Easy opening and set up. Intelligent walking test system. Voltage: 9.0 - 15 V CC; traditionaly 7 mA. Dimensions: 9.8 x 5.7 x 4.35 cm. Operating temperature from -10°C to 55°C. Relative humidity from 5 to 93% (Without condensation). Security grade 2 certified.