Sensors & components
3-axis accelerometer, optical heart rate monitor, altimeter, vibration motor, relative SpO2 sensor, NFC (in special editions only)
Display
Touchscreen, grayscale OLED
Battery type
Lithium-polymer
Battery life
Up to 7 days, depending on use, settings, and other factors
Charge time (0-100%)
Two hours
Radio transceiver
Bluetooth 4.0
Water resistance
Water resistant up to 50 metres
Operating temperature
-10° to 45° C
Maximum operating altitude
8 535 m
Syncing
Syncs automatically and wirelessly to computers and 200+ leading iOS, Android & Windows devices using Bluetooth LE wireless technology (iOS 9 and later, Android 5.0 and later and Windows 10 devices)
Syncing range
Up to 6 m
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
What’s in the box
Fitbit Charge 3, classic wristbands (both small & large), charging cable
