Gadgets
Bluetooth Gadget Alarm
This small device connects wirelessly via Bluetooth to your favorite gadget and it will set off an alarm if that gadget will be taken away more than five meters (16 feet).
Burglar
Gadgets
Doorstop Burglar Alarm
This burglar alarm would fit nicely in the 10 Fun and Weird Doorstops article. A 120dB high-pitched alarm will sound when someone tries to push the door against the stopper.