Description This item is a pair of Active Infrared Detectors. Install each pair at the opposite positions at the gate. Then there will be a infrared area between these two detector parts. When someone enter into the infrared region, the detector will send alarm signal to the security alarm host. And then the security alarm will give an alarm. Feature - Color: Black - Material: PC - Single Alarm Size: 9x7.5x17cm - Outdoor guard distance: 100m. - Beam Quantity: 2 - Light Source: Infrared - Current: 65mA - Working Temperature: -25 anddeg C -65 anddeg C - Working Humidity: 95 percent - In the shape of cylinder, it is comfortable to grip and easy to install. - Dual infrared beam transmitter and receiver, more accurate and efficient. - Adopting advanced technology, it has strong resistance to hard light and bad weather. - Equipped with 3 LED indicators, easily understand the pairing status. - Working parts are angle adjustable, so you can pair them more easily and there will be less effect of restriction of terrain. Packing list1 x pair of Infrared Detector Sensor Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.