Ajax Alarm Dual Curtain detector, you can secure the perimeter of your Home/Business with this detector by fitting the sensor.
Bi-Directional motion sensor, this sensor has 2x PIR's on each side allowing you to cover up to 30m down the perimeter of a building. The curtain detector will continue to operate even if the temperature drops to -10°C.
Up to 15m Range in each direction
When installed correctly, this outdoor Curtain keeps your Home or Business safe.
See Specs here