Automatically track how long and how well you sleep and set a silent vibrating alarm
Track steps, distance, calories burned and active minutes. Syncing range: Up to 113 feet
Interchangeable metal, leather and classic bands (sold separately). Charge time is one to two hours. Bluetooth 4.0
Note: FitBit technical support number 0800 069 8505 and the call center is open Monday-Friday 8-7pm.