The SmartFinder is a gadget that helps users quickly locate lost items. Comes complete with four colour coded receivers which can be attached to things like keys, wallets, purse, mobile phones, hand bags… The remote control transmitter can send a radio signal through walls and floors to activate the 85 decibel alarm on the receiver, locating items up to 25 metres away. Just be sure not to lost that remote or you’re screwed.
Source: Girl Shop