• Better measure calorie burn, understand resting heart rate & more with 24/7 heart rate tracking and a battery life of up to 7 days (varies with use and other factors); Charge time (0 to100 percent) 2 hours
• Choose from 15 plus exercise modes like run, bike, swim, yoga, circuit training and more, set a goal, and get real time stats during your workouts to see how you can keep getting better
• Automatically record time spent in Light, Deep and REM sleep stages and see activity trends, health insights and personalized guidance in one place with Fitbit Today. Operating temperature is -10° to 45° Celsius
• Swim proof and water resistant to 50 Meters so you can track swims and wear in the shower; We do not recommend wearing Charge 3 in a hot tub or sauna; Also connect to smartphone GPS for real time pace and distance during outdoor runs and rides
• Stay connected to your day with everyday apps for weather and more and get call, text and smartphone app notifications on your wrist; Small wristband Fits a wrist between 5.5 to 7.1 inches; Large wristband Fits a wrist between 7.1 to 8.7 inches
• Radio transceiver: Bluetooth 4.0. Syncing range up to 6 meters

• Utilize 24/7 heart rate to more accurately track calorie burn, resting heart rate & heart rate zones during workouts
• Track all day activity, including steps, distance, hourly activity, active minutes and calories burned
• Automatically track sleep, plus due to the heart rate feature, get more insights into your light, deep & REM sleep stages
• Enjoy up to 5 days of battery for daily progress without constant charging. Varies with use and other factors
• Automatically and conveniently record workouts like walks, swimming & bike rides in a snap with SmartTrack

• What is in the box: 1x Small and Large Bands , 1x Charging Cable , 1x Fitbit Ionic Tracker
• All-Day Activity
• Reminders To Move
• Built-In GPS
• Track Swims
• Multi-Sport
• Purepulse Heart Rate
• Cardio Fitness Level
• Guided Breathing Sessions
• Sleep Stages
• Stores & Plays Music
• Customisable Clock Faces

• Use Amazon Alexa Built in to get quick news and information, check the weather, set timers and alarms, control your smart home devices and more all through the sound of your voice (third party app may be required; Amazon Alexa not available in all countries)
• Based on your heart rate, time asleep and restlessness, Sleep Score helps you better understand your sleep quality each night; Also track your time in light, deep and REM sleep stages and get personal insights
• Control your Spotify app, download Pandora stations and add Deezer playlists plus store and play 300+ songs on your wrist (subscription required; Pandora is US only)
• With a larger display and an always on option, your information’s always a quick glance away (always on display requires more frequent charging)
• Track heart rate 24/ 7, steps, distance, calories burned, hourly activity, active minutes and floors climbed. Syncing range - up to 6.1 metres
• Works around the clock with 6 plus day battery life (varies with use and other factors)
• Get call, text, calendar and smartphone app notifications when your phone is nearby; Plus send quick replies and voice replies on Android only

• 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)
• Use 15 plus exercise modes to record workouts and connect to smartphone GPS for more precise real time pace & distance
• Access your favorite apps for sports, weather & more and get call, calendar, text, and app alerts
• Get call, text, calendar and smartphone app notifications when your phone is nearby. Plus send quick replies on Android only
• Enjoy a slim, comfortable design with a lightweight, anodized aluminum watch body that is swim proof (water resistant to 50 meters) ; Hi Res Touchscreen : Amplified brightness up to 1000 nits & durable screen made from Corning Gorilla Glass 3
• Automatically track select sports & workouts with SmartTrack and use female health tracking in the Fitbit app to log periods, symptoms and more

1.Watch weight: 54g 
2.Bluetooth connection: Bluetooth V5.0
3.Battery capacity: 260mAh
4.Battery life: 15days (heart rate on all day)
5.Charging time: 2-3 hours 
6.IP68 waterproof 
7.Adjustable wristband: 6.1 to 9.3 inches (perimeter)