Overview:SONOFF PIR2 Sensor is a 433MHz RF PIR motion sensor for human detection. The motion detector can work with the Sonoff RF Bridge 433, providing human detected alarm message push to your phone.Features:*Dual infrared.*Ultra-low power microprocessors.*Double temperature compensation technology.*Robust and durable, suitable for homes, offices, sheds, garages etc.*Easy installation and set-up, wall-mounted.Specifications:433MHz Transmit distance: 150m (open)Voltage: 3V (2*AA)Standby current: 9AAlarm current: 10mAWireless frequency: 433.92MHzWireless Transmit Code: 1527Mhz (default)Detection distance: 12m@ 25Detection angle: 110 degreesMaximum coverage area: 12m*12mAlarm indicator light: on for 3 secondsWorking environment: indoorTamper switch: normally closedAnti-white light intensity: 10000LuxBattery type: 2*AA (not included)Item Size: 120 * 62 * 46mmPackage Information:Package Size: Approx. 16.5 * 10 * 6.5cm / 6.5 * 3.9 *2.55inPackage Weight: Approx. 185g / 6.53ozPacking List:2 * Sonoff PIR2 Sensor (without batteries)