Travel too much? Worry often that the precious laptop you are carrying can be stolen when you leave your hotel room? Just get this portable burglar alarm and place it right behind the door, and you are all set!

Once tripped, the device emits a piercing 110dB alarm for five seconds, which may be enough to scare the crook away. The alarm setup also includes the 12V battery required to power this little device.

Price? $4 to $16

[source: toolmonger.com]