Protect Your Home This touch sensor can secure key access points and trigger an alarm when doors/windows are opened. 120dB ultra-loud buzzer anti-theft device, safer to use. Wide range of applications This door glass sensor can monitor your home 24 hours a day. Use it on doors, windows, cabinets, drawers, or anywhere you want to be notified when it is opened or closed. Doorbell/alarm, dual mode optional. Safety Essentials Install this alarm in your home, office, factory, it will remind you to check the security when the doors and windows are opened by children or theft. For staying in a hotel, you can install this anti-theft alarm on the doors and windows, it will protect you when you leave for the next time. The easy-to-use Window Burglar Alert requires no special wires. Just hang on the interior doorknob, turn on the switch, and the window alarm will scare away uninvited guests, keeping you and your home well protected. Shipment Quantity: 1pcs (without battery)