TrackR

[Lazybones]

Referal link for free TrakR

Shameless warning the link above is supposed to bump me up the queue... but this is one of those BlueTooth Low energy tracking devices to help you locate lost items like your keys with your phone...

If you are interested follow the link, or skip directly to the main site if you don't want to refer http://www.stickrtrackr.com/