* Loud 130 dB alarm sounds when door or window opens, and will sound continuously 60 seconds, helps deter intruder and alert
* Easy to install and no wiring required. Includes two magnetic burglar alarm sensors and double-sided tape.
* Built-in low battery test button to easily check battery life, includes 3x LR44 batteries for each security alarm.
* Open door alarm perfect for home, car garage, apartment, dorm room, RV, hotel, traveling and more. Suitable for sliding glass