Overview: This wireless wide angle passive-infrared (PIR) motion sensor is a 433MHz RF PIR motion sensor for human detection. The motion detector can work with the Sonoff RF Bridge 433 or alarm system host, providing human detected alarm message push to your phone. Features: *Dual infrared. Ultra-low power microprocessors. *Imported sensors, overcome false alarm, anti-crawling, no dead angle. *Double temperature compensation technology, adjustable pulse count. *Robust and durable, suitable for homes, offices, sheds, garages etc. *Cute appearance with super mini size. Easy installation and set-up, wall-mounted. Specifications: 433MHz Transmit distance: 100m (open) Power: 3V CR2450 battery (not included) Standby current: 15A Alarm current: 25mA Wireless frequency: 433.92MHz Wireless Transmit Code: 1527Mhz (default) Detection distance: 8m@ 25 Detection angle: 110 degrees (wide angle) Working environment: indoor Case Material: ABS plastic Item Size: 62* 35 * 35mm Item Weight: Approx. 28g / 0.99oz Package Information: Package Size: Approx. 6.8 * 5 * 4cm / 2.7 * 2 * 1.6in Package Weight: Approx. 35g / 1.2oz Packing List: 1 * PIR Motion Sensor (without batteries) 1 * Mounting Bracket 1 * Bag of Mounting Screws