PHYSEN Wireless Driveway Alarm,Long Range PIR Outdoor Motion Sensor Burglar Alarm System,DIY Home Security Motion Sensor Chime Doorbell Kit Protect Garage/Sheds/Garden Security,1 Receiver and 1 Sensor650ft Wireless Motion Sensor AlarmThe plug in receiver will emits a up to 110db sound when motion detector was triggered by someone get through your gate, driveway, garden etc Large working area up to 650ft(no obstacles) to full cover your propoty and security. Upgraded Motion Detector, 3 Gears Adjustable Sensitivityopen the back cover of the motion detector, Install 4*AA batteries and turn main power switch on, cover it and connect the detector and