Vktech&reg; 106dB Wireless IR Infrared Remote Security System Motion Detector Alarm Wireless, infrared detector, Long-range multi-channel wireless remote control, convenient to use Accurate identification. Owner identification delays alarm,With Adjustable mount bracket, easy to install Includes 2 direct infrared remote controls. Please use it directly facing to the sensor -Suitable for homes, offices, yards, shops, etc. Detection range: Approx. 8 meters distance, angle of 110 degrees Remote control infrared warning devices should be able to look straight on the range of protection. And can not have obstacles