Key facts
- Brand
- Fitbit
- Model
- Flex 2
- Documents
- 2
- Languages
- ZH · EN
- Last added
- 2026-10-15
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Fitbit Flex 2 User Manual
User Manual 33 pages · 1.4 MB · EN
The Fitbit Flex 2 is a versatile activity and sleep tracker designed to make fitness fashionable. This user manual guides you through unboxing the device, which includes a tracker, charging cable, and small and large wristbands. It details how to move the clasp between bands and insert the tracker securely into your chosen wristband.
Read onlineFitbit Flex 2 specifications
| Wireless technology | Bluetooth 4.0 radio transceiver |
|---|---|
| Battery type | Rechargeable lithium-polymer battery |
| Memory storage (minute-by-minute) | Seven days |
| Memory storage (summary totals) | 30 days |
| Sensors | MEMS 3-axis accelerometer |
Source: Fitbit Flex 2 User Manual
All Fitbit Flex 2 documents by type
User Manual 2
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How long does it take to fully charge the Flex 2?
It takes 2 to 3 hours to fully charge the device.
How many days of battery life can be expected on a full charge?
A full charge provides up to 5 days of battery life.
What is included in the box?
The box includes the tracker, a charging cable, and small and large wristbands.
How often should I sync my tracker?
We recommend syncing your tracker at least once a day.