Fitbit Versa Special Edition Smart Watch - Charcoal Aluminum/Black Band (FB505)The Fitbit Versa Special Edition Smart Watch Activity Tracker. Charcoal Aluminum and Black Band with Small and Large sizes. Model: (FB505). Features: Store and play 300 plus songs, utilize on screen workouts that play on your wrist and coach you through every move and track swim laps and floors climbed Track your all day activity, 24 7 heart rate, & sleep stages, all with a 4 plus day battery life (varies with use and other factors) and a slim,