[ALARM TRIGGERED BY MAGNETIC WIRELESS SENSOR]: Alarm triggered after the front door or window is opened. The alarm system will be activated when the door opens more than 0.6 inch. [SUPER LOUD ALARM]: 130 dB Siren alarm can not only cause a huge shock on thieves, but also allows you to wake up during your sleep to prevent a horrible accident. [EASY TO USE AND INSTALL]: Wireless remote control, easy to use. Two installation methods, stick with double-sided sticker or tie it with strap, no tools required. It is suitable for homes, apartments, mobile homes, offices, hotel rooms, garages and more entry alert systems. [KEEP YOUR CHILDREN SAFE]: This door alarm and magnetic wireless sensor window is powerful enough to detect entry, it lets you know when your children open the doors or windows to prevent children and babies from going out whether you are inside or out. exterior of the house. Especially, if you have a swimming pool at home, it is very necessary to install a door alarm. [DON'T WORRY ABOUT NOT WORKING]: The burglar alarm can be used during one year without changing the battery frequently. When the battery voltage (including 2 AAA batteries) is lower than 2.1V, a beep will sound. Don't worry about not working. With a wireless door chime, no one will miss you. The alarm system will be activated when the door opens more than 0.6 inch. Easy installation on the door, window where you want to protect. Such as your home, office or store, apartment, dormitory, cabinet, drawer, garage, etc. Package List 1 * Door Alarm (Batteries Included)</p > 1 * remote controls 1 * user manual 1 * double-sided tape