The free Pebblebee. Finder App is compatible with the Pebblebee. Finder Bluetooth tracker. The Pebblebee. Finder: Find your Keys and Phone in seconds. Ring the loud buzzer and flash the LED to find lost items. Push the button to find your Phone. Always track your items when in range on a Map. Replaceable battery that lasts up to 1 year. Up to 200 ft range. Surgical Stainless Steel ring. Compatible with Bluetooth 4.0 devices (HTC One M8, Samsung Galaxy S4/5/6/7, Samsung Galaxy Note 3, Nexus 4, Nexus 5 and most other BLE4.0 compatible Android devices). Requires Android version 4.4 or later. For best performance use 5.0 or later. Note: Continued use of your phone's GPS in the background may decrease battery life. To purchase more visit us at www.pebblebee.com. Instagram us @ www.instagram.com/pebblebeeincLike us @ www.facebook.com/pebblebeeFollow us @ www.twitter.com/mypebblebee.