Finally, an affordable Fitness Tracker that offers all the bells and whistles. Smart Function tracks your daily steps, distance and calories, while automatic heart rate tracking helps you monitor your fitness level. It has an IP68 waterproof rating for use swimming, diving or taking a shower, so it only needs to be taken off before a hot bath. By removing the wristband, you can use the built-in USB connector to charge directly into a USB port on a computer or AC wall adapter. One single charge gives you up to 13 days of working time. Features include: Pedometer, Sleep Monitor, Alarm, remote control selfie, health monitoring, exercise tracking and sleep analysis. Compatible System: iOS & Android. Charging method: Unplug both sides of the tracker from the wristband. Insert the USB plug of the tracker directly into a USB port on a computer or AC wall adapter.