4-Pack Door and Window Alarms for Child Safety, Home Security, Office Security, Magnetic Anti-Theft Alarm Sensors, Door and Window Alarms, Free Batteries

Powerful alarm: The door and window detectors are powerful enough to detect entry, prevent children and babies from leaving, and protect your office, garage, dorm room, or apartment, whether you're inside or outside. You can hear the alarm in other rooms as well. Don't worry if young children handle it; simply place it up high, out of their reach. Suitable for sliding doors, windows, drawers, and refrigerators. Dimensions: 6.5 cm x 3 cm x 2 cm, installs without taking up much space. Features: Magnetic door and window alarm, loud and clear, alarm sound up to 90 decibels, sensitive detection, capable of triggering the alarm quickly to alert you. Easy to install: Simply stick the main and secondary parts to the door and door frame or to two windows respectively and align them (leaving a gap of approximately 5 mm). When someone opens the door or window illegally, the alarm emits a loud sound to warn the intruder to leave. If you wish to open the door or window yourself, you can do so using the switch. Suitable for theft prevention in homes, offices, shop counters, etc.

Installation Method: 1. Use double-sided tape to attach the main unit to the edge of the door/window. 2. Stick the other magnetic strip in a straight line along the line of the main unit on the door frame. 3. Check the setting, then turn the main unit switch to the "ON" position. 4. Open the door to see if the alarm sounds a siren.