Water resistant and swim tracking - Track time in the water. If the band gets wet or you sweat in it, remove and completely dry the band before putting it back on. Charge 4 automatically syncs to most popular iOS and Android devices to show your stats, trends and progress on your Fitbit dashboard.
Operating temperature: ° to 45 °C; Maximum operating altitude: 9. Designed to give you more guidance than ever, Ionic serves up personalised workouts that play on screen and guide you through every move. Multi-sport modes let you track specific workouts like weights, runs and rides.
Purepulse heart rate - Optimise your effort with heart rate zones. Water resistant and swim tracking - Track time in the water.
Ionic is water-resistant and has enhanced swim-tracking capabilities. Just start Swim Mode to record your laps, stroke style, calories burned and more. If you forget to record it, SmartTrack will have your back by tracking swims for you.
Sleep stages - See time in sleep stages.
Ionic helps you to better understand your sleep quality by using PurePulse® heart rate to track your time spent in light, deep and REM sleep stages. See valuable insights about your sleep to get a clearer picture of your nighttime habits, how your routine might be affecting your sleep quality and what you can do to improve it.
Resting heart rate - Track resting heart rate. Learn how your cardiovascular health and fitness is progressing by tracking your resting heart rate and following your heart rate trends over time.
Smart notifications - Get important notifications Stay connected to what matters most with texts, calls and calendar alerts and notifications from apps like Facebook and Gmail.