Tech specs 
Size43 x 22 x 8mm (H x W x D)
Material
ChargingUSB
BatteryLithium-ion polymer battery
Battery lifeUp to 2 weeks
Water-resistanceNo
Weight8 grams
SensorOptoelectronics sensor; Green / Red LEDs; High precision MEMS 3-axis acceleromete
DisplayOLED Touchscreen
Screen size128 pixels x 32 pixels
ColorsBlack, Blue
Other
Activity tracking
Steps 
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepElevation climbed actively
Heart rateYes
Vo2MaxYes
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notifications
Other
Links
View on
Amazon US ratingBlood oxygen level
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