4 Pack 125dB Door and Window Alarm with Vibration Sensor, White, Slim and Thin Burglar Detector with Adjustable Sensitivity LED Indicator for Home Security

Loud 125dB Alarm: It works by detecting physical vibrations. The 125dB audible alarm and flashing red light can help you prevent potential intrusions and thefts. Easy to Use: No wires or screws/hubs are needed for installation; simply peel and stick (double-sided adhesive tape included). Super easy to install and use. Adjustable Sensitivity: The adjustable sensitivity system prevents false alarms. Adjustable sensitivity is activated by pushing, tapping, or gently touching to avoid false alarms. You can easily set it up according to your preferences. Ultra-Thin and Lightweight: An ultra-thin design and excellent performance make it perfect for your family, apartment, office, shop, garage, dorm room, and even RV. It's the best choice for a home security alarm detection system. Low battery warning: This alarm is battery-powered; each sensor requires 3 LR44 batteries (not included). Frequent battery replacement is not necessary. The low battery warning will remind you when the battery needs replacing.