PGST's Home Security System provides an easy-to-use, cost-effective security solution to prevent break-ins. An alarm sounding at up to 122 decibels is enough to make potential intruders think twice about entering through a door or window. No wiring is required for installation, simply mount the alarm with the included double-sided tape for easy protection. When the door or window is opened, the base of the alarm will detach from the magnet, which triggers the ringing alarm. The system is equipped with a motion sensor that detects the movement of trespassers, forming a comprehensive and reliable security system. This PGST brand personal security alarm is perfect for homes, apartments, dormitories, offices, RVs, campers and more.This product needs to be used with the PGST alarm system