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Fitbit Flex 2 General Info & Specifications
Sensors
Your Fitbit Flex 2 contains 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.
Fitbit accessory bangles, bands and, pendants sold separately are available in
durable elastomer and stainless steel.
Wireless technology
Flex 2 contains a Bluetooth 4.0 radio transceiver.
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.
