The Bestdeal Smart Healthy Bracelet Wristband Sport Gym Fitness Tracker Bluetooth Sync Android Compatible(Available in Many Colors) Perfect for office workers, weight imbalance people, sports enthusiast, exercise regularly,etc. 24 Hours wear Comfortable 0 radiation Bluetooth synchronization Package content:1 host(built-in battery),1 charging line,1 of this manual, 1 strap, 1 packing box