Transceiver Interface Type | Bluetooth 4.0 (for wireless syncing) |
Syncing Distance | Up to 20.0' (6.1 m) |
Water Resistance | Yes, can be submerged up to 32.8' (10.0 m) |
LEDs | 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 |
Sensor | MEMS 3-axis accelerometer measures your motion patterns to determine your calories burned, distance traveled, steps taken, and sleep quality. Its altimeter measures stairs climbed |
Motor | Cylindrical vibration motor allows it to vibrate when alarms are set to go off |
Memory | Fitbit recommends syncing your data regularly. As long as Flex has battery power, it tracks the most recent seven days of minute-by-minute data. It also tracks your daily total for the past 30 days and summarizes your daily calories, distance, and steps taken |
Battery Type | Lithium-polymer |
Battery Life | 5 days |
LED Indicators | When charging your Flex the LED lights will indicate its level of charge. All 5 lights will light up when it's fully charged |
Operating Temperature | -4 to 113° F (-20 to 45° C) |
Storage Temperature | -22 to 140° F (-30 to 60° C) |
Altitude | 30,000' (9,144 m) (maximum operating altitude) |
System Requirements | Operating Systems: Windows XP/Vista/7/8 USB port Internet connection Mac OS X 10.5 and up USB port Internet connection Supported browsers: PC: Chrome 12 and up Firefox 3.6.18 and up Internet Explorer 8 and up Mac: Chrome 12 and up Firefox 3.6.18 and up Safari 5.0.5 and up |
Dimensions | Small: 5.5 - 6.9" (140 - 176 mm) Large: 6.3 - 8.2" (161 - 209 mm) Width: 0.6" (15.2 mm) |
Weight | Not specified by manufacturer |
Packaging Info | |
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Package Weight | 0.25 lb |
Box Dimensions (LxWxH) | 8.425 x 2.441 x 2.362" |
Reviews Fitbit Flex Wireless Activity and Sleep Tracker Wristband (Black)