Aware C Bluetooth Anti-Lost Tracker Tracking Car and Other Items, Car and Item Finder and Locator with Bult-in App Smart Launcher for iOS/iPhone/iPod/iPad With Aware you can ring/buzz your attached items, so that you never lose important things like keys Also adds contextual launch for cars so that you never fumble with apps before driving Intelligently processes all the information you need and make it available on a single tap One time device cost, replaceable watch battery Standby time 1 year