Displaying details for Fitbit Charge HR
 Fitbit Charge HR
Tech specs 
SizeWidth: 21mm
Small: 13.7cm-15.7 cm in circumference
Large: 15.7cm-19.3 cm in circumference
XL: 19.3cm-22.1 cm in circumference
MaterialFitbit Charge HR's wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Fitbit Charge 2 also has a surgical-grade stainless steel buckle.
ChargingUSB
BatteryLithium-polymer
Battery lifeup to 5 days
Water-resistanceSweat, rain and splash proof.
Weight26 grams
SensorOptical heart rate tracker, 3-axis accelerometer, altimeter, vibration motor
DisplayOLED
Screen size0.9 cm
ColorsPlum, Blue, Tangerine, Black
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepYes
Heart rate24/7
Vo2Max
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notificationsCaller ID
Other Clock,auto sleep detection, silent wake alarm,auto exercise recognition
Links 
View onAmazon
Amazon US rating3.7 out of 5 stars
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