Door Window Alarm, 90dB Wireless Sensor Alarm for Kids & Home Security

LOUD DOOR ALARM: This alarm is loud enough to immediately sound a strong alarm when someone illegally opens a door or window, high-quality magnetic sensors trigger alarms up to 90dB, protects your home and office place, prevents children from getting out of the room and getting lost, super durability and stability.
EASY INSTALLATION: Simple paste installation and operation, press the on/off switch to turn the power on/off, insert 2 AAA batteries (batteries are not included in the box), peel off the double-sided tape and paste it on the door, the distance between the magnet and the alarm should not exceed 0.6in.
LIGHTWEIGHT PORTABLE: Ultra-thin design, 3.4″ x 1.1″ x 0.6″, lightweight and easy to carry, to protect your important items. Ideal entry warning for homes,apartments,mobile homes,offices,hotel rooms,garages,and more.