Title: does what it says
Review: The window units as others have said are kind of lame since you can just close the window and the alarm goes off and there is an on/off switch for it!The door unit works very well. I have a little trim around my door that puts a little gap between the magnet and the sensor and it still works. It's also very loud. Who knows whether this will actually stop someone breaking in but at the very least it'll startle him and even if he does take off with your plasma TV, his ears will be ringing for a while.
Is this product review negative?