Door Alarm Sensor,110dB Loud Window Alarms When Opened,4 Mode Battery Operated Door Chime for Home Security,Garage,Kids Safety,Refrigerator,Apartment,Office,10PK

4 Alert Modes: Equipped with four professional alarm modes, providing all-around security protection. Magnetic sensors trigger alarms immediately when doors or windows open. Continuous alarm mode sounds for over 10 seconds even after doors or windows are closed. The door/window open alert function issues reminders when doors or windows remain unclosed, while the pleasant doorbell mode offers friendly notifications for visitors.
Low Battery Warning: Features an efficient low-power design with an intelligent battery monitoring system. Emits a single beep (0.5 seconds) when battery is low, and provides a double alert every 30 minutes during normal operation, ensuring uninterrupted security protection.
110dB Loud Siren: The powerful 110-decibel alarm instantly detects unauthorized entry, effectively deterring intruders while preventing accidental exits by children or pets. Ideal for monitoring elderly individuals, guests, or sleepwalkers who may inadvertently open doors.
Tool-Free Installation: Includes double-sided adhesive pads and pre-installed LR44 battery for completely hassle-free setup. Simply peel and stick to any surfaceno wiring or screws required. For optimal performance, maintain a critical 0.39-inch gap between the alarm and magnetic sensor during installation.
Versatile Use: Works on all window types (sliding, casement, awning), pool doors, refrigerators, drawers, freezers, and interior doors. Provides reliable security for homes, offices, apartments, garages, mailboxes, and commercial spaces while offering special protection for child safety in living areas.