Wireless Home Security Alarm System DIY Kit – Magnetic Sensor – Guardian Protector Security Burglar Alarm for Homes, Cars, Sheds, Caravans, Motorhomes (Set of 6)

♣Easily mounted by adhesive. Type to window or door. Ideal entry warning for homes,apartments,mobile homes,offices,hotel rooms,garages,and more!
♣Magnetic sensor switch detects your door or window.Easy stick installation and operation, press on/off switch to power on/off then insert 2 PCS AAA battery (battery do not contain in the box),tear the double-sided adhesive on the backpack, paste 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 issue a strong alarm, warning the intruder to leave and remind the owner.