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This slim, stylish device is with you all the time. During the day, the Fitbit Flex™ tracks steps, distance, and calories burned. At night, it tracks your sleep cycle 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. Flex™ uses five white LED indicator lights to show you how your day is stacking up against your goals. Each light represents 20% of your goal. Just tap the display twice to see your progress against your daily goal.
Tracks steps, distance, calories burned and active minutes.
LED lights show progress against your goal.
Monitors your sleep and wakes you with a silent alarm.
Wear all day and night, even in the shower.
Includes small & large wristbands: Small 5.5 - 6.9 inches (140 - 176 mm); Large 6.3 - 8.2 inches (161 - 209 mm)
Wireless sync dongle
Free Fitbit.com membership - includes ability to log and track activity, food, sleep, water, body mass, weight, and more
Access to free mobile apps for iPhone and Android
Instantly launch your Fitbit app by tapping your Flex on your NFC-enabled Android phone
Width: 0.6 inches (13.99 mm)
Battery Life: 5 days
Battery Type: Rechargeable Lithium-polymer
Radio Transceiver (for wireless sync): Bluetooth 4.0
Operating Temperature: -4° to 113° F (-20° to 45° C)
Non-Operating Temperature: -22° to 140° F (-30° to 60° C)
Water Resistant: Device is water resistant, and can be submerged up to 10 meters.