Fitbit Flex
- Water Resistance: Sweat, rain and splash proof. However, the device does not support swimming. We also recommend taking Charge off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean.
- We recommend charging your device every few days to ensure you are always tracking. Charge time: One to two hours. Battery life: up to 7 – 10 days. Battery type: Lithium-polymer
- Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices
- Sensors & Components
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3-axis accelerometer and Vibration motor
- Battery type
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Lithium-polymer
- Charge time
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One to two hours
- Radio transceiver
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Bluetooth 4.0
- Maximum operating altitude
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9,144 m