We've seen different types of Bluetooth trackers over time, some being simplistic, others more complicated. StoneTether seeks to make a name for itself amongst these, doing so with a mixture of tiny size and long-range tracking capabilities that lets users locate items even if they're a fair distance away. Says the maker, StoneTether has a 500ft. range via an integrated antenna, and it works in conjunction with a related app (iOS and Android). The app works to advise users before something is lost, sending alerts when the user moves away from a tagged device -- or, alternatively, if a tagged device is moving away from the user.