Door And Window Alarm Home Hotel Protection 130db Door Magnetic Induction Alarm Features: Magnetic Door and Window Alarm Sensor 130db alerts people to door or window opening. PLEASE NOTE: This alert does not apply to uneven surfaces. children from going out without notice. Also the ideal entry warning for your home, office, apartment, garage, etc. Slim door and window alarm with 2 adjustable settings (off/on). Bring your own 2 batteries. Easy installation, no wiring required! No screws required! Comes with double-sided tape! NOTE: Make sure the between the alarm and the magnetic sensor is within 0.39 inches. Ultra-sensitive low battery indicator for checking battery life. It's the perfect compliment to your home's . Product Description: Door And Window Alarm Home Hotel Protection 130db Door Magnetic Induction Alarm Material: ABS Color: as the picture shows, (Due to the difference between different monitors, the picture may have slight color difference. please make sure you do not mind before ordering, Thank you!) Package weight: 70g Package size: 10x6.5x2.5cm,(Please allow 1-3mm error due to manual measurement. please make sure you do not mind before ordering.) Children from going out without notice. Also the ideal entry warning for your home, office, apartment, garage, etc. Magnetic Door and Window Alarm Sensor 130db alerts people to door or window opening. PLEASE NOTE: This alert does not apply to uneven surfaces. Slim door and window alarm with 2 adjustable settings (off/on). Bring your own 2 batteries. Easy installation, no wiring required! No screws required! Comes with double-sided tape! NOTE: Make sure the between the alarm and the magnetic sensor is within 0.39 inches. Ultra-sensitive low battery indicator for checking battery life. It's the perfect compliment to your home's .