Features: 1.SAFE AND RELIABLE: The window alarm immediately detects any movement of the door or window. You can keep intruders out or alert you when children or pets or visitors arrive. 2.EASY INSTALLATION: Turn on the system test setting to see if opening the door/window can trigger the alarm. Easy to install with adhesive tape, just peel and stick to window, doors, cabinets or toolboxes, etc. 3.SIMPLE TO USE: The door alarm is very easy to use, you just need to place it on the refrigerator door and press the magnetic lock. 4.APPLICABLE SCENARIO: Ideal protector against accidental intruders, can be used in kitchen, bathroom, bedroom, garage, office and so on. 5.STURDY AND DURABLE: The door alarm is made of ABS material, which is durable and can be used for a long time. Specification: Item Type: Security Window and Door Alarm_x000D_ Material: ABS_x000D_ Power Mode: AAA Battery x2 (Battery Not Included)_x000D_ Operating Temperature: -10 to 60C/14 to 140F_x000D_ Size: Approx. 1.5 x 8.4 x 4.3cm / 0.6 x 3.3 x 1.7in PackageList: 1 x_x000D_ _x000D_ SecurityWindowandDoorAlarm (Battery Not Included) 1 x Magnetic Strip 3 x Double Sided Tape 1 x English Manual Note: When the door magnet is activated, the sensor will sound an alarm._x000D_ And it can be mounted on the window to prevent children from accidentally opening