What's Included:

Fitbit Charge 2 tracker

Charge 2 Classic wristband

Charging cable

Sensors & Components:

Optical heart rate tracker

3-axis accelerometer

Altimeter

Vibration motor

Display:

OLED

Heart Rate:

Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements. 

Battery and Power:

We recommend charging your device every few days to ensure that you're always tracking.

Battery life up to 5 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.

Battery type: Lithium-polymer

Charge time: One to two hours

Radio transceiver: Bluetooth 4.0

Memory:

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 Charge 2 is sweat, rain and splash proof. However, the device is not swim proof or shower proof. With any wearable device, it’s best for your skin if the band stays dry and clean.

Care:

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. 

Materials:

Fitbit Charge 2's wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Fitbit Charge 2 also has a surgical-grade stainless steel buckle.

Environmental Requirements:

Operating temperature: -10° to 45° C

Maximum operating altitude: 9,144 m

Syncing & Notifications:

Using Bluetooth LE wireless technology, Fitbit Charge 2 sends smartphone notifications and syncs automatically to computers and 200+ leading iOS, Android and Windows devices. Certain features like smartphone notifications or Connected GPS may require Android 5.0+.

Syncing range: Up to 6.1 m

Syncing requires Bluetooth LE and Internet connection. 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 4.3 and later, and Windows 10 devices.

   Large

Fits wrists 16.5 cm - 20.6 cm in circumference