Note: Do not mount the unit in direct sunlight or near heat sources.Overview:It's based on proprietary infrared spectrum detection technology, when human moves within the scope, the sensor receives the signal and inputs it into microprocessor after magnification. It works well in settings like balconies, window/door sides and corridors.Features:*MCU technology to prevent all kinds of false alarms. With high catch performance.*SMT chip, anti-EMI & anti-RFI design. Anti-tamper alarm function to enhance anti-damage.*The curtain passive infrared detector is exquisite design, easy installation.*It could work with Chuango 315MHz G5/A11/B11/H4 Plus alarm system, can't work with 433MHz alarm system.*Fit for the locations of the living room window, office window, entrance door, etc.Specifications:Power Supply: DC 3V 2*AAA LR03 1.5V Battery (included)Static Current: 50uAAlarm Current: 9.5mADetection Distance: 5mCurtain Detection Angle: 15Transmitting Distance: 80m (in open area)Radio Frequency: 315MHzHousing Material: ABS PlasticOperation Condition: Temperature: -10C ~+55CRelative Humidity: 80% (non-condensing)Detector Szie: 48 * 33 * 88mm (L * W * H)Package Information:Package Size: Approx. 16 * 11 * 5cm / 6.3 * 4.3 * 2inPackage Weight: Approx. 150g / 5.3ozPackage List:1 * Wireless PIR Motion Sensor