Fitbit Alta HR
Tech specs 
SizeWidth 15mm
(Sizes depend on type of band)
MaterialWristband is made of a flexible, durable elastomer. The tracker is made with surgical-grade stainless steel, and the buckle is made with aluminum.
ChargingUSB
BatteryLithium-polymer
Battery lifeup to 7 days
Water-resistanceSweat, rain and splash proof
Weight15 grams
Sensor3-axis accelerometer, Vibration motor, optical heart rate sensor
DisplayOLED
Screen size1.4-inch, 128 x 36 pixel resolution
ColorsBlack, Blue/Gray, Coral, Fuchsia
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
Floors
SleepYes
Heart rate24/7
Vo2Max
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notificationsYes
Other Clock, auto sleep detection, silent wake alarm, auto exercise recognition.
Links 
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Amazon US rating4.1 out of 5 stars
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