This alarm has built in PIR motion sensor that will activate the alarm if any movement is detected. It is ideal for protecting your property against intruders/burglar. It can cover the front door, back door, garage, shed, outbuildings etc. Wireless design make it easy to install, just put the required batteries in, fix to a suitable surface and turn it on with one of the supplied remote control. It can be widely used at house, office, factory, store, even carvans and motor homes. Features: Built in PIR motion sensor, it will automatically activate the alarm when the body get close to it. Come with 2 remote controls for ON/OFF. Stronger anti-interference, lower power-wear and longer-using life. Easy to install, with wall mounting bracket with swivel ball or keyhole for hanging About 7-10 meters range for detection. The sensor will alarm with 105 dB when some one moves within the detecting area. The intelligent time-delay design is supposed to be more suitable for the place without a guard. It can be widely used at house, office, factory, store, even carvans and motor homes. Specification: Material: ABS Color: White Power Supply: 4 * AA Batteries (not included) Sound: 105db alarm Detection Range: about 7-10m Remote Control Working Distance: about 5-10m Scanning Area: 110° Mount Method: Wall Mounted Alarm Size: 12.2 * 8.6 * 4.6cm/4.8 * 3.4 * 1.8in Remote Control Size: 5.9 * 3.5 * 1.5cm/2.3 * 1.4 * 0.6in Package Weight: Approx. 200g/7.1oz Package list: 1 * Infrared Alarm (batteries are not included)) 2 * Remote Control Notes: 1. Mount it at suitable angle to avoid false alarm. 2. The sensor should be away from heat source, such air conditioner, heater etc. 3. The sensor should not face the sunlight directly. 4. If the remote control cannot work well, you should change the battery.