Black, TrackR Pixel, Bluetooth Tracking Device, Key Tracker, Phone Finder, Wallet Locator, Lights Up & Rings To Help Uncover Misplaced Items, TrackR App Records Its Last Known Location On A Map, When Another TrackR App User Comes Within Bluetooth Range Of Your Lost Item, Its Location Will Be Automatically Updated In Your App, Press Pixel To Ring The Phone Loudly Even When It's On Vibrate, Connectivity: BLE 4.0, IOS 8.0+ & Android 4.4+, Free Battery Replacement Program.