Door Window wireless Alarm

This is a perfect helper to protect your house or store. Install the product 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.