Fitbit Zip Flex - Fitbit Flex General Info & Specifications; Sensors and Motors; Size and Weight; Environmental Conditions

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Fitbit Flex General Info & Specifications
Sensors and motors
Your Flex uses a MEMS 3-axis accelerometer that measures your motion patterns to
determine your calories burned, distance traveled, steps taken, and sleep quality.
Flex also contains a vibration motor, which allows it to vibrate when alarms go off.
Size and weight
Length
Width
Weight
Small wristband (incl. tracker)
5.5 – 6.9 in
140 – 176 mm
0.6 in
13.99 mm
13.4 grams
Large wristband (incl. tracker)
6.3 – 8.2 in
161 – 209 mm
0.6 in
13.99 mm
14.6 grams
Environmental conditions
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.
Maximum Operating Altitude
30,000 feet
(9,144 m)