Compatibility Windows: Vista and later
Mac: OS X 10.6 and later
iOS: iPhone 4s and newer
Android: 4.3 Jelly Bean and later
Wireless Connectivity Bluetooth 4.0 Smart (LE)
Wireless Range Up to 20' (6 m)
Water Resistance Swe...
Track steps, distance, calories burned and active minutes
See stats and time with a bright OLED tap display
Automatically track how long and how well you sleep, and set a silent, vibrating alarm
Personalize with interchangeab...
Fitbit charge 2 strap: unique magnetic closure clasp, it automatically stuck and lock to another end of the band, no buckle needed. Premium stainless steel metal material, sweat and water resistance, flexible, adjustable, c...