- Built-in GPS + GLONASS
- Red and infrared sensors for oxygen saturation (SpO2) monitoring
- 3-axis accelerometer
- Wi-Fi (802.11b/g/n 2.4GHz)
- Ambient light sensor
- Vibration motor
- Optical heart rate sensor
- Device temperature sensor (skin temperature variation available in the Fitbit app)
- Water-resistant to 50 metres.
Battery & Power
Battery life up to 6+ days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Use of the always-on display and SpO2 features will require more frequent charging. We recommend charging every few days to ensure you’re always tracking.
- Battery type: Lithium-polymer
- Charge time: (10-80%): Approximately 40 minutes
- Fast charging: 1 day of battery life in 12 minutes
- Radio transceiver: Bluetooth®
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Please verify the specifications at the time of purchase. No claim whatsoever would be accepted in case of specification error/mismatch, once the product is sold.