Wobon Bluetooth Sync Healthy Smart Bracelet Sport Fitness Tracker Android-Compatible Smart wristband with OLED screen Clearly displays health parameters including steps, calories, distance, time and sleep quality Package content: 1 host(built-in battery),1 charging line,1 of this manual, 1 strap, 1 packing box Supports Bluetooth 4.0+EDR It is suitable for office workers.weight imbalance people: sports enthusiast