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Fitbit Flex 2 General Info & Specifications
Sensors
Your Fitbit Flex 2 contains the following a MEMS 3-axis accelerometer, which tracks your motion
patterns.
Materials
The wristband that comes with Flex 2 is made of a flexible, durable elastomer material similar to that
used in many sports watches. It does not contain latex.
The clasp that comes with Flex 2 is made of surgical-grade stainless steel. While all stainless steel
contains traces of nickel and can cause an allergic reaction in someone with nickel sensitivity, the amount
of nickel in all Fitbit products meets the European Union's stringent Nickel Directive.
Accessory necklaces, bracelets, and clips sold separately are available in durable elastomer and stainless
steel.
Wireless technology
Flex 2 contains a Bluetooth 4.0 radio transceiver.
Haptic feedback
Flex 2 contains a vibration motor, which allows the tracker to vibrate with alarms, goals, and
notifications.
Battery
Flex 2 contains a rechargeable lithium-polymer battery.
Memory
Flex 2 stores most minute-by-minute stats and SmartTrack data for seven days. It stores summary totals
for 30 days. Stored data consists of steps, distance, calories burned, active minutes, exercise, sleep, and
stationary vs. active hours. We recommend syncing your tracker at least once a day.
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