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
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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