Loud Anti-theft Alarm - The 120 dB security door alarm is perfect for signaling to you when there is an unwanted entry. Audible at over 750 feet it sounds loud so the person knows they should stop what they are doing. Safety window alarms great for prevention, protect your children’s rooms or stop anyone from sneaking out or in | Multifunctional 4 Modes - This wireless alarm sensor with 4 modes, it’s not only a refrigerator alarm, but also a door alarm for home security helps deter intruder/thieves effectively by 120dB loud alarm, especially suitable for the elderly or people who do not hear well at home to use, .and can be door open chime help notify you if children/pet or others are coming/ going. It can also be a hotel door alarm for travelers. | Fast Automatic Switch - Ultra-sensitive magnetic sensor can quickly detect your door or window status, The wireless door alarm sensor works with 2*AAA battery (batteries are not included). The door sensor alarm volume will decrease when the battery is low, and the alarm time will be shortened | Easy To Install - The wireless security alarms can be installed anywhere with an opening area. Simply use the adhesive provided and tape it to wherever you need! Windows, doors, and entrances simple and straightforward with the door stop alarm. The minimum distance for the device to work is 10mm (0.4 inches), so when installing make sure to get both pieces of the window alarms as close as possible. | High Quality - The pool door alarms use most advanced optimized circuit chip is adopted to reduce the power consumption of the battery and continue to be used for this door alarms for kids safety. High quality ABS material is used to prevent dust. You could return with any reason during the first 90 days.