Tile is an American consumer electronics company which produces key finder devices which use Bluetooth 4.0. The devices work with a companion mobile app for Android and iOS, which allows users to locate lost items through Bluetooth or where they were last seen. In September 2015, Tile launched Generation 2 hardware that includes find-your-phone functionality and other feature upgrades, which by January 2016 sold over 4.5 million units. In August 2017, two new versions of the Tile were launched, the Tile Sport and Tile Style.