Make fitness fun, day and night. All-Day Activity Tracking Track your steps, distance, calories burned, active minutes, hourly activity and stationary time. SmartTrack Automatically track activities like running, sports and aerobic workouts, then see exercise summaries in the Fitbit app. Auto Sleep Tracking Automatically track how long and how well you sleep, set a sleep goal and bedtime reminder to form good habits & wake up peacefully with a silent alarm. Swim-Proof Track swimming automatically & see your exercise summary in the Fitbit app. Plus, never worry about making a splashfrom bubble baths to beach days. Stay connected to your day. Call & Text Notifications When you get calls and texts, Flex 2 vibrates and the discreet LED display flashes colour-coded lights, so you don’t miss the messages that matter. Reminders to Move To help you stay active throughout the day, Flex 2 sends Reminders to Move that encourage you to take 250 steps every hour. Long Battery Life With up to 5-day battery life* in an ultra-slim package, you can track all day and night without needing a charge.