The FitBit Charge 2 is the best-selling tracker for FitBit. It is an improved and innovated version of Charge HR. The improvements are not so subtle, most prominent being the large OLED screen with tap display. The upgrade is especially a welcome edition for those who are more into fitness tracking. FitBit Charge 2 has multi-sport tracking and can pair with your phone and provide enhanced functionality in the presence of GPS. CONTENTS You FitBit Charge 2 comes with three basic components: Fitbit Charge 2 tracker Charge 2 Classic wristband Charging cable The wristband is detachable and you can swap it for other colors and materials sold separately.