Door Window Alarm with Siren Magnetic Sensor - Battery Powered - 2x CR2032

The ultra-thin window / door alarm is designed to trigger a burglar alarm when a door or window is opened. With the simple switch on the side of the device, the device can be switched on and off if necessary. The thin profile makes it ideal for mounting on a window or door. The alarm requires 2 x CR2032 batteries (included), the average battery life for normal use is one year. The alarm has an indicator light for an almost empty battery. Press the "Battery test" button on the front of the device to check the battery status. The alarm unit is mounted with a set of double-sided adhesive tape (included), stick the alarm and magnetic sensor on the door or the window and you are done.