【Glass Break Alarm with 125dB Loud Alarm】Our window alarm has a 125dB loud alarm and a built-in vibration sensor. It can effectively detect vibration and glass breakage and trigger an alarm. The 125dB loud alarm can deter and scare away the thief. 【Easy to Install and Use】The glass break detector is very easy to install, it can be installed in less than a minute, no wiring is required. Just peel and stick the alarm to the desired position on the window, then press the power button, the LED will flash and make a "di" sound, and the alarm is activated and ready to protect your home. 【Vibration Sensitivity Adjustment Design】Window Glass Break Detector Alarm has a sensitivity adjustment function, you can adjust the vibration sensitivity according to your needs, which can prevent false alarms. Rotate it to the tip, the lower the sensitivity, the higher the sensitivity. 【Battery Powered Window Alarm】The window vibration alarm with window sensor is powered by 3 batteries (included), the