Wireless Security Alarm for Windows and Doors (1 Pack)

Security Window and Door Alarm with Wireless Sensor 1 PackEasy to mount with adhesive. Write to window or door. Ideal entry warning for homes apartments mobile homes offices hotel rooms garages and moreMagnetic sensor switch detects your door or window. Easy installation and operation press the onoff switch to turn onoff and then insert 2 AAA batteries battery not contain in the box tear the double-sided adhesive on the backpack stick the door knob alarm on your target position.Super loud 90 dB alarm. When someone opens the door or window illegally the relative position of the primary and secondary parts changes the alarm can emit a loud alarm warning the intruder to leave and reminding the owner0