Locate your smartphone with the Proximo Key Fob Bluetooth Tracker from Kensington. The free Kensington Proximo app is available for download from iTunes and the Google Play Store. Once installed, the Proximo key fob connects to your device via Bluetooth 4.0 and can be used to locate your smartphone with the press of a button. Furthermore, with a touch of the app screen on your smartphone, you can sound the alarm and locate your Proximo key fob. There is also a proximity meter that provides a distance estimate for your missing item. The key fob has a built-in LED visual alert so you can find your keys in the dark.