ALL-DAY ACTIVITY
Set a goal
and go.
Stay focused on your goals and get motivated to be more active with Flex—a slim, stylish device that tracks all-day activity like steps taken, distance traveled, calories burned and active minutes.
PROGRESS DISPLAY
See your day in
a whole new light.
Flex lets you see how every day is stacking up with LEDs that light up like a scoreboard as you get 20% closer to completing your step, calorie or distance goal.
SLEEP + ALARMS
Step. Sleep.
Wake. Repeat.
Flex never sleeps—even when you do. Wear it all night to measure your sleep quality and how long you slept. Then, wake with a silent, vibrating alarm to start your day stepping on the right foot.
STYLE + ACCESSORIES
Wear Flex your way
every day.
Style your Flex tracker with bright accessory bands, or turn it into a fashion piece with our exclusive Flex collection from Tory Burch. To change bands, simply pop the slim Flex tracker out of your wristband and slip it into the accessory that fits your personality.
Note:
- The full product specifications below are from the manufacturer and may contain information related to other package quantities that will not apply to the product that you are reviewing. Please confirm the actual content and/or package quantity from the main product specifications page.
- These specifications may represent the entire product series/model/line to which this product belongs with specific configuration differences between the individual products stated.
- These specifications may have been copied from the same product in other region/country in which case there might be minor differences in region-specific data such as Input Voltage, Terms of Warranty etc.
Sensors and Components
- 3-axis accelerometer
- Vibration motor
Display
- LED display with 5 white indicator lights
- Tap twice to see progress against your Main Goal
- Tap rapidly for 1-2 seconds to start or stop sleep tracking
What’s Included
- Removable Fitbit Flex™ tracker
2 wristbands (small and large)
Charging cable
Wireless sync dongle
Water Resistance
Flex has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Flex off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean.
Care
If the band gets wet or if you sweat in it, remove and completely dry the band before putting it back on. Clean the band with a mild soap-free cleanser like Cetaphil Gentle Skin Cleanser or Aquanil. Give your wrist a rest by taking the band off every now and then. Learn more.
Materials
The Flex wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Flex also has a surgical-grade stainless steel clasp.
Battery and Power
We recommend charging your Flex every few days to ensure you are always tracking.
- Battery life: up to 5 days
- Battery type: Lithium-polymer
- Charge time: One to two hours
- Radio transceiver: Bluetooth 4.0
Environmental Requirements
- Operating temperature: -4° to 113°F
- Maximum operating altitude: 30,000 feet
Memory
- Tracks 7 days of detailed motion data, minute by minute
- Tracks daily totals for past 30 days
Flex syncs automatically and wirelessly to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology.