Bluetooth Low Energy has a lot of potential to change the way our mobile devices interact with the environment around us, and applications of the technology for device tracking are only the tip of the iceberg. Tile, a startup that crowd funded $2.7 million for a Bluetooth Low Energy-based device-tracking chip, was proof of the viability of a concept now being adopted by Nokia for its Lumia phones in the form of a “Treasure Tag.” The Treasure Tag uses a combination of Bluetooth Low Energy and NFC technology used for mobile wallets to track whatever the tag is attached to, like a set of keys, from an app on the phone. The process also works in reverse, allowing the user to press a button on the tag to trigger a sound on the phone, so long as it’s within about 160 feet. Battery life is a concern with these devices, as Treasure Tag only lasts about 6 months (Tile advertises a 12 month lifespan), but the technology could have us all spending a lot less time hunting for our keys.