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-resistanceWater resistant up to 50 metres (5 ATM)
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
Calories burnedYes
ActivityYes
FloorsYes
SleepYes
Heart rate24/7
Vo2Max
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
GPSYes
Running features
Swimming features
Other Clock, auto sleep detection, silent wake alarm,multi-sport, auto exercise recognition, music control
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected pay
Links 
Affiliate link*Amazon | Fitbit
Read moreReview
*Disclosure: We are a professional review site that receives a small commission from sales of certain items, but the price is the same for you. See our affiliate disclosure page for more details.
**All tech specs and images on this page come from manufacturers. These may change over time as manufacturers sometimes update their devices. While we cannot guarantee absolute accuracy of information on this page, we promise to review this content regularly and do our best to bring you the most up-to-date information. To be absolutely sure of tech specs of a particular device, we recommend checking the manufacturer’s website.