MarketBoss W2 3D IP68 Waterproof LED Smart Wrist Watch Bracelet Walking Calorie Counter/Pedometer/Time and Temperature Display/ & Sleep Mintor analysis-with Rechargeable USB2.0 port Tracking your walking steps,calories burned With Time & date and Temperature LED display,adjust the time through computer synchronization With Sleep monitor to make you how long and well you sleep Reechargeable through USB Port& Record exercise date Adopts Chip imported from Germany,High Quality