Ensure the safety of people and property: the volume of door and window alarms reaches 130 dB, which sounds once the door is opened, which not only can cause a huge shock to thieves, but also you helps wake you up during your sleep to prevent a horrible accident. A door and window alarm with wide applications, ideal for home, office, hotel, apartments, garages, dorm room, or even RV. Use the remote to control four functions: Door and window alarms are powerful. You can use the remote control to arm, disarm, change ringtones and emergency functions. It's very useful. You can adjust according to different scenarios, and even press the emergency function. The alarm sounds directly and can be used when calling for help in an emergency. Standby time Durable and long: the anti-theft alarm can be used for one year without changing the battery frequently. When the battery voltage (each door alarm including 2 AAA batteries) is lower than 2.1V, a beep will sound. Don't worry about not working. This battery is easy to purchase and replace. Working principle: When the closing distance between the host and the magnetic strip is less than 1cm, no alarm sound will be issued; When the separation distance between the host and the magnetic strip is more than 1cm, an alarm sound will be issued. Therefore, when someone opens the door or window illegally (the host is separated from the magnetic strip), the alarm will immediately emit a high-pitched sound. Easy to Install with Double-Sided Adhesive Tape - Comes with double-sided adhesive tape. Easily mounted on the window or door with the adhesive tape. No wiring needed No screws needed You can install this alarm on all windows and doors, drawers, doors and other flats. PS: The remote control can be used in an open space at a distance of about 15m. Number of shipments: 2 x window alarm (without battery), 2 x remote control (without battery)