General description Compact design, smaller than most door window alarms. DIY installation, just peel and stick. Easy to mount on various types of doors and windows, including swing doors, rolling doors, and sliding doors. Features a loud anti-theft alarm that acts as a deterrent for thieves and intruders. Includes a doorbell mode for quick warnings when kids or pets sneak out. Offers 4 working modes: general alarm, continuous alarm, door closing alarm, and doorbell mode. Technical specifications Alarm dimensions: 56 x 30 x 17 mm Magnet bar dimensions: 35 x 10 x 10 mm Power supply: 3 LR44 batteries (included) Low battery indicator: Sounds "Du Du" every half hour when battery is low Installation Attach double-sided tape to the back of the alarm and the magnetic bar, then stick them firmly on the two sides of the door or window joint. Ensure the inverted V line of the two parts is aligned and the distance between them is less than 1 cm. Usage General alarm: Sounds when the door is