6-Pack Door and Window Alarms, Magnetic Intrusion Detector, for Child Safety, DIY Home Security, Office Protection, AAA Battery Purchase

Size: 2.52" x 1.67" x 0.66", doesn't require much space for installation. It has 3 adjustable settings (on/off).

SMART DESIGN - The alarm and magnetic strip are separated by more than 10 mm, so it continues to trigger until you close the door (by connecting them) or turn it off (by pressing the "OFF" button).

LOUGH ALARM - The door and window detectors are powerful enough to detect entry, prevent children and babies from leaving the house, and protect your office, garage, dorm room, or apartment, whether you are inside or outside. You can definitely hear it from another room to alert you. Young children are unlikely to tamper with it; simply place it high enough so they cannot reach it.

Works on sliding doors, windows, drawers, and refrigerators.

EASY INSTALLATION - Wipe the flat surface, peel off the sticker, install the alarm on the door and the magnetic strip on the door frame. Done!

ENERGY SAVING - The power supply battery can be used for more than a year (2 x 3A batteries not included)【NOTE: 1. Remove the plastic insulating sheet in the battery compartment before use, 2. The small triangle on the side of the magnet is aligned with the small triangle on the side of the alarm with a gap of less than 0.39 inches (10 mm), 3. Your frame and the window or door must be flush; these two components must be installed very flush with each other】【We recommend checking the ba