Fitbit charge 2 activity tracker watch

Size small with adjustable band Proof of purchase from Best Buy Comes with charger Product description: -built for all-day use & workouts -continuous heart rate -track calorie burn -all-day activity and auto sleep tracking -Record your workouts with multi-sport modes -large LED display -customizable clock faces and interchangeable bands -Sync wirelessly and automatically to 200+ iPhone, android and windows devices -battery life of up to 5 days