Most helpful critical review
76 of 82 people found the following review helpful
False alarms make it unusable.
on December 18, 2010
-It works. Opening a window or glass door on which the alarm is attached will make it go off.
-It uses two AAA batteries which are widely available.
-It has a Low and a High sensitivity setting.
-It goes off at full volume for a fraction of a second when it is turned on. This is unnecessary and disturbing. If you turn it on at night, your neighbors might not appreciate being woken up.
-There are several reasons why this vibration alarm can go off, including strong winds, loud vehicle horns (especially from trucks), and other peculiar loud noises -- even at the Low sensitivity setting. I say this from personal experience. Do you really want to leave your home with this turned on, knowing it may alarm for no good reason? Even if you intend to use it only when someone is home, even so, it is likely that you may sometime forget to turn it off when leaving home. It might've helped if the alarm was either less sensitive or more intelligent, although I know the latter is probably a lot to ask.
-It doesn't turn off automatically after a while if it has gone on (until the battery is exhausted). This may be a pro or a con, but if it's still on after say ten minutes, it is probably a con.
In summary, because of the false alarms, I cannot recommend this item. I trashed it, and opted for a GE magnetic alarm instead.