Tracks Steps Distance Walked Calories Burned Active Time & Sleep Quality 3D Accelerometer Tracks Movement & Converts Into Steps Bluetooth Low Energy Flexible Band Made Of Durable Elastomer With Stainless Steel Clasp Sweatproof & Splashproof Rechargeable Li-ion Battery With Up To 5 Days Of Use Time Includes Tracker Module 1 Swappable Band Charging Cradle & Micro USB Charging Cable