•Available in three sizes: small (5.79 inches / 147mm), medium/large (6.77 inches / 172mm) and extra-large (7.76 inches / 197mm).
•Includes two easy-to-insert links (.32 inches / 8mm and .63 inches / 16mm) for a fine-tuned fit
•USB charging cable and sizing tool included
•Ambient light sensor detects environmental light levels and adjusts accordingly
•Bluetooth 4.0 pairing to smart phones (for use with the Nike+ FuelBand app for iOS 6.1 and above, iPhone 4S and above, and iPod Touch 5th generation and above)
•Optimized for the web (Mac OSX v10.6 and above / Windows XP, Vista, 7 and 8) and works on iOS devices (iPhone 4S and above, iPod Touch 5th generation and above).