Sensors & Components :
Optical heart rate monitor
Ambient light sensor
WiFi antenna (802.11 b/g/n)
Battery and Power :
Fitbit Ionic has a battery life of 4+ days with a GPS battery life up to 10 hours.
Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.
We recommend charging Fitbit Ionic every few days to ensure you are always tracking.
Battery type : Lithium-polymer
Charge time (0-100%) : Two hours
Radio transceiver : Bluetooth 4.0
Saves 7 days of detailed motion data - minute by minute.
Saves daily totals for past 30 days.
Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times.
Water Resistance :
Fitbit Ionic is water resistant to 50 meters.
After swimming or getting the band wet, we recommend drying the band because, as with any wearable device, it's best for your skin if the band is clean and dry.
We do not recommend wearing Ionic in a hot tub or sauna. See www.fitbit.com/productcare for more details.
If the band gets wet or if you sweat in it, remove and completely dry the band before putting it back on.
Give your wrist a rest by taking the band off every now and then.
The Fitbit Ionic classic band is made of a flexible, durable elastomer material similar to that used in many sports watches, and includes an aluminum watch case and buckle.
Heart Rate :
Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements.
Operating temperature : -4° to 113° F
Maximum operating altitude : 30,000 feet
Syncing & Notifications :
Fitbit Ionic syncs automatically and wirelessly to computers and 200+ leading iOS, Android & Windows devices using Bluetooth LE wireless technology.
Syncing range : Up to 30 feet
Certain features like smartphone notifications may require Android 5.0+.
Windows 10 computers that do not have Bluetooth LE will need a wireless sync dongle in order to sync.
Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen.
and later, Android 4.4 and later and Windows 10 devices.
Music control via Bluetooth Classic on Android and Windows devices.
Music control via Bluetooth LE on iOS devices.
Fitbit Ionic watch
Classic wristbands (small and large)