Power
| Charging source |
USB |
| Battery technology |
Lithium Polymer (LiPo) |
| Battery life |
5 day(s) |
Packaging content
| Cables included |
USB |
| Number of bands included |
1 |
| Receiver included |
Y |
Design
| Housing material |
Stainless steel, Thermoplastic Elastomer (TPE) |
| Band colour |
Blue |
| Waterproof up to |
10 m |
| LED indicators |
Y |
| Waterproof |
Y |
Performance
| Pedometer |
Y |
| Quality of sleep |
Y |
| Active minutes |
Y |
| Calories burned |
Y |
| Distance traveled |
Y |
| Hours slept |
Y |
| Accelerometer |
Y |
Ports & interfaces
| Bluetooth version |
4.0 |
| Bluetooth |
Y |
System requirements
| Browser supported |
Chrome, Firefox, Internet Explorer, Safari |
| Mac operating systems supported |
Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks |
| Windows operating systems supported |
Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64 |
| Mobile operating systems supported |
Android, iOS |
Operational conditions
| Storage temperature (T-T) |
-30 - 60 °C |
| Operating altitude |
0 - 9144 m |
Additionally
| Colour of product |
Blue |
| Wireless technologies |
Wireless |
| Operating temperature range (T-T) |
-20 - 45 °C |
Flex, LED, USB, Bluetooth 4.0
Make fitness a lifestyle with Flex™.
FLEX™ WIRELESS ACTIVITY AND SLEEP WRISTBAND
This slim, stylish device is with you all the time. During the day, it tracks steps, distance, and calories burned. At night, it tracks your sleep quality and wakes you silently in the morning. Just check out the lights to see how you stack up against your personal goal. It’s the motivation you need to get out and be more active.
Set a goal and go
Flex allows you to set a goal and uses LED lights to show how you're stacking up. Each light represents 20% of your goal. You choose which one — steps, calories, or distance. It lights up like a scoreboard, challenging you to be more active day after day.
FLEX TRACKS:
- Steps taken
- Distance traveled
- Calories burned
- Active minutes
- Hours slept
- Quality of sleep
Powered by Fitbit's leading-edge accelerometer, Flex bases calculations like calories burned on your personal profile — reflecting your stats, not any average Joe's.
