This is a perfect helper to protect your house or store. Install the alam on  wall or a doorframe/window-frame, and stick the magnetic stick on the door/window (ensure that the two magnet parts touch each other when the door/window is closed). Put the switch onto on . If any unwanted intruders open your door/window, the two parts will separate from each other, the alarm will send out warning sound to warn the holder, and scare off the intruder, until the magnet strap folded.
Features:
* Electronic Magnetic Sensor detects entry.
* Alarm is activated when the two pieces are separated.
* Gives an alarm if someone opens the door or the window.
* The alarm stops when the two parts recombined.
* Alarm with ON/OFF switch for easy operation.
* Super loud 90 dB alarm sound.
* Ideal entry warning for homes, apartments, mobile homes, dorms, offices, hotel rooms, garages, and more!
* Clean-stick adhesives behind units.
* Easy to install--just peel and stick.
* Easily mounted to windows or doors with included mounting tape.
* Steady and convenient to use.
* Wireless unit without any cords.
* Mini shape.
* Producted by the imported elements.
* With handsome and decent appearance.
* Economical and practical.
Specifications:
* Color: White
* Housing: Plastics
* Alarm volumn: 90 dB
* Battery: 2*AA batteries (not included)
* Mode of reaction: Separate from magnetism
* Method of installation: Riveted with mounting tape
* Dimensions of the alarm: 90*30*20mm
* Net weight: 25g
Package including:
1*Mini Wireless Door/Window Entry Safety Security Magnetism Alarm
1*Magnetic stick   
Package dimensions: 148*93*25mm
Package weight: 38g