The Motion Sensor miniAlarm is a stand-alone security device capable of detecting motion and setting off a blazingly loud 130db alert. This unit can also be used in conjuction with the FreezeAlarm or as a bundle with our auto-dialer to call a phone and alert of an intruder. The miniAlarm motion sensor is designed for vacant homes, cabins, apartments, offices, garage, boats and RV's. It is not a recommended alarm system if you have the motion sensor alarmed if pets are present in the building.