Features: Wide Application – Compatible with all gate openers. Suitable for access control systems, parking lots, perimeter walls, doors, windows, balconies, garages, passages, and other locations. Ideal for security installations in schools, office buildings, hospitals, residential yards, and more. Stable Signal Transmission – High-power infrared transmitter and receiver. The transmitter emits a reliable, invisible infrared beam up to 20 meters (65 feet). When the beam is interrupted, the relay outputs a switch signal. Waterproof & UV Resistant – Fully sealed, waterproof, and dustproof egg-shaped housing with a sunlight-filtering design allows reliable operation in harsh environments. Easy to install. Reliable Performance – Incorporates advanced security technology for enhanced protection. The infrared photocell beam causes the gate to stop or reverse automatically when an obstruction is detected, ensuring safety and property protection. Easy Installation – Mount each pair in opposing positions to create an infrared detection zone. When an object passes through the beam, the detector sends a signal to the security alarm host (not included). Specifications: Color: Black Material: PC (Waterproof, UV resistant) Detection Range: Outdoor: 20m; Indoor: 30m Detection Speed: 30ms Infrared Frequency: 1.92kHz Wavelength: 940nm Operating Voltage: DC 12-24V Input Current: RX 15mA, TX 30mA Relay Output: A1 36W Item Size: 76 x 49.2 x 21.6mm / 3.0 x 1.9 x 0.9in Package Includes: 1 Pair Infrared Sensor (Transmitter and Receiver)