System requirements
| Mac operating systems supported |
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, Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan |
| Mobile operating systems supported |
Android 5.1, Android 4.4, Android 5.0, iOS, Android 4.3 |
Performance
| Distance traveled |
Y |
| Calories burned |
Y |
| Active minutes |
Y |
| Position location |
N |
| Vibrating motor |
Y |
| Pedometer |
Y |
| Motion sensor |
Y |
| Accelerometer |
Y |
| Floors climbed |
N |
| Stairs climbed |
N |
| Workout tracking |
Y |
Design
| Dustproof |
Y |
| Splash proof |
Y |
| Waterproof up to |
50 m |
| Band material |
Elastomer |
Power
| Battery life |
5 day(s) |
| Charging time |
2 h |
Additionally
| Wireless technologies |
Wireless |
Bluetooth 4.0, 31.7 x 8.9 x 6.8 cm, Lithium-polymer, Blue
<b>Make fitness fun, day and night.</b>
<b>All-Day Activity Tracking</b>
Track your steps, distance, calories burned, active minutes, hourly activity and stationary time.
<b>SmartTrack</b>
Automatically track activities like running, sports and aerobic workouts, then see exercise summaries in the Fitbit app.
<b>Auto Sleep Tracking</b>
Automatically track how long and how well you sleep, set a sleep goal and bedtime reminder to form good habits & wake up peacefully with a silent alarm.
<b>Swim-Proof</b>
Track swimming automatically & see your exercise summary in the Fitbit app. Plus, never worry about making a splash—from bubble baths to beach days.
<b>Call & Text Notifications</b>
When you get calls and texts, Flex 2 vibrates and the discreet LED display flashes color-coded lights, so you don’t miss the messages that matter.
<b>Reminders to Move</b>
To help you stay active throughout the day, Flex 2 sends Reminders to Move that encourage you to take 250 steps every hour.
<b>Long Battery Life</b>
With up to 5-day battery life* in an ultra-slim package, you can track all day and night without needing a charge.
<b>You’ve never seen fitness like this.</b>
Get a closer look at Flex 2 accessories and see how easily you can transform your tracker from day to night, or workout to wedding.
