LOUD SIREN: The 130 dB loud alert will remind you and your family that someone is entering or leaving your house. Wireless door sensor alarm helps improve home and child safety, protect dorms, apartments, offices, medicine cabinets, windows, drawers, pool doors, doors refrigerator, etc. EQUIPPED WITH 2 REMOTE CONTROLS: You can use the remote control to set disarm, chime, alarm and panic options within 50 feet, even if you arm it from the outside. If your family comes home late at night, they can disarm with another remote first and then open the door. It will not disturb neighbors or other family members. EFFECTIVE AND SENSITIVE: When the door is opened more than 0.6 inch, the alarm system will be activated immediately. This is not a false alarm, nor a waste alarm. Prevent your children from sneaking in unknowingly and protect your home, office. You will still hear the warning when you are 750 feet away from the room. LOW BATTERY REMINDER AND LOW POWER CONSUMPTION: The contact sensor can standby per year, no need to replace batteries (2 AAA batteries included) frequently. When the battery voltage is lower than 2.1V, a beep sound will be emitted to remind you to replace the batteries. EASY TO INSTALL AND USE: No wiring required No screws needed< /p> Easily mounted with double-sided tape. Simply stick the 2 parts of the burglar alarm to 2 sides of the door/window frames and they do not need to be completely flush with each other. The anti-gravity tape (provided) helps you attach the gate alarm remote control somewhere and you can remove it. at any time. Don't worry about young children ruining it.