Feature: 1. Outdoor Waterproof Design: Single beam infrared beam alarm with waterproof cover design, fully sealed waterproof (fog), dustproof (insect proof) and other all weather integrated structure design, so that it can work normally in harsh environments. 2. Unique Design: IR beam sensor has high power transmitter, 90% sensitivity margin, high power infrared transmitter receiver pair tube, low power processing technology circuit protection design. High level of RFI EMI resistance and unique digital filter circuit design. 3. Strong Anti Interference: Single infrared beam sensor uses a hemispherical optical lens to concentrate the beam. Accurate and non scattering, with the automatic strong light adjustment system, it can effectively avoid the interference of strong light and car headlights. 4. Wide Use: Active infrared detector can replace passive infrared intrusion detectors installed in small supermarkets, convenience stores, visitor entrances and exits, and window entrance protection, and for security systems such as school, office building, dormitory, and home garden. 5. Installation: The best installation height should be more than 20cm, installation distance should be not less than 1m; infrared protection device should be vertically placed, and in the same horizontal line. First, please install the receiver, the transmitter (when in a straight line, OFF light of receiver goes out), then fix, connect line and complete installation. Specification: Item Type: Infrared Beam Sensor Material: ABS Colour: Black Technology: Infrared Receiving Range: ≤15m / 49ft Infrared Frequency: 1.92KHz Working Voltage: 12-24V DC/AC Application System: Vehicle Guardrail System, Sidewalk Gate System, Factory Warehouse, Hotel Villa, Family Door And Window, etc. . Package List: 1 x Infrared Transmitter1 x Infrared Receiver4 x Short Screw6 x Long Screw6 x Screw Sleeve1 x Manual