Ouvis IM1 SECURITY 433MHz wireless Passive Infrared PIR Motion Detector for Security Systems Embedded battery installed, No need to install battery yourself;low power consumption, support one year power usage 433MHz Wireless PIR Motion Detect, Can work with 433MHz wireless integrated ip camera(HiKam Q7 etc.) Very Stable, Zero False Alarm;Anti-interference;Anti-pet(&lt;25KG) Unique Dynamic Temperature Compensation Algorithm, Adaptive range:-20~~50 Long Distance support, over 100m in open area