Fitbit Charge
Tech specs 
SizeSmall size fits wrists 14cm-16.5cm
Large size fits wrists 16.5cm-19.5cm
X-large size fits wrists 19.5cm-22.6cm
MaterialStainless steel casing, elastomer strap
ChargingUSB
BatteryLithium-polymer
Battery life7-10 days
Water-resistanceWater resistant up to 10 metres (1 ATM)
Weight26 grams
Sensor3-axis accelerometer, Altimeter, Vibration motor
DisplayOLED
Screen sizeN/A
ColorsSlate, Blue, Burgandy, Black
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
Floors
Sleep
Heart rate
Vo2Max
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notifications
Other Caller ID
Links 
View onAmazon | eBay
Amazon US rating3.4 out of 5 stars
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