Features 1、Single Beam Technology: The wireless infrared detector uses single beam technology, reliable and accurate motion detection, effectively deterring any intruders. 2、Durable and Waterproof: Made with waterproof and dust proof design, this wireless motion detector alarm effectively withstands harsh weather conditions, with its internal parts kept safe from damage caused by rain or snow. 3、Strong Interference Resistance: The detector features a strong interference resistance capability by using a hemispherical optical lens for concentrated and precise beam, with an automatic strong light adjustment system to avoid the interference of intense light and car headlights. 4、Versatile Application: When installed on both sides of the entrance gates, this wireless infrared motion sensor connects to the barriers. When a vehicle interrupts the infrared beam, a signal is sent for the barrier arm to lift. Ideal for parking lots, pedestrian lanes, factories, warehouses, villas, hotels. 5、Sturdy Construction: The motion detector alarm security sensor is made with an ABS housing for sound light independent alarm functionality. It is resistant to both cold and heat, increasing the lifespan of the device. Specification Item Type: Infrared Motion Detector Security Alarm Material: ABS, PCB Battery Type: 2 x AAA Battery (Battery is not included for infrared receiver) Installation Method: Wall Adhesive Wireless Transmission Distance: Approx. 15m / 49.2ft Transmission Frequency: 1.92kHz Package List 1 x Infrared Receiver 1 x Infrared Emitter 2 x Accessories 2 x Short Screws 6 x Long Screws 6 x Expansion Screws 1 x User Manual