Tracks Daily Physical Activity Counts Steps Distance Time & Calories Burned Monitors Sleep Quality Tracks Progress In Real Time Bluetooth Connectivity Allows User To Synchronize Device With Other Devices To Share Stats Receives Calls & Text Alerts .91" Oled Screen Compatible With Iphone 4s & Up & Android 4.3 Slim Comfortable & Easy To Wear Waterproof Rechargeable 80mah Battery Up To 49ft Range Orange