GE 56789 SmartHome Wireless Window Alarm by General Electric

Alarm sounds when window is opened

Owner Reviews, Ratings, Comments and Criticism
This alarm is terrific if you're in an apartment. For a house I would spend the money to have the whole house wired, but for apartments, it does the trick. Put one on each window/door and forget about the $100's in gates and bars. I refuse to be the prisioner in my own abode with gates and bars on the windows... I live in NYC. This alarm is loud and the batteries can be tested without setting it off. If you have old wooden windows it may not line up properly but you have a half inch deviance to play with before it activates, but most of the windows in NYC are energy efficent aluminum double glass..so for $6.06 each they're a bargain. I highly recommend it for apartment living.