Fitbit Surge
Tech specs 
SizeSmall size fits wrists 13.9cm-16.0cm
Large size fits wrists 16.0cm-19.8cm
X-large size fits wrists 19.8cm-22.6cm
MaterialStainless steel casing, elastomer strap
ChargingUSB
BatteryLithium-polymer
Battery lifeup to 7 days
Water-resistanceTested up to 50 metres (5 ATM) (sweat, rain and splash proof)
Weight32 grams
Sensor3-axis accelerometer, Altimeter, Optical heart rate monitor, 3-axis gyroscope, GPS, Compass, Ambient light sensor, Vibration motor
DisplayTouchscreen monochrome LCD
Screen size20.88 x 24.36 mm
ColorsBlue, Tangerine, Black
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepYes
Heart rate24/7
Vo2Max
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
GPSYes
Running features
Swimming features
Smartphone notificationsYes
Other Clock, auto sleep detection, silent wake alarm,multi-sport, auto exercise recognition, music control
Links 
Affiliate link*Amazon | Fitbit
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