Garmin Vivofit 4
Tech specs 
SizeWidth: 19 mm
Thickness: 9.4 mm
Circumference (small/medium): 122-188 mm
Circumference (large): 148-215 mm
Battery2 x SR43 user-replaceable
Battery lifeMore than 1 year
WeightRegular: 26 grams; X-large: 28 grams
Sensor3 axis-accelerometer
Display88 x 88 pixels
Screen size0.43" x 0.43" (11 x 11 mm)
ColorsBlack, White, Speckle
Other4 week internal memory
Activity tracking 
SleepMonitors total sleep and periods of movement or restful sleep
Heart rate
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running featuresAccelerometer (calculates distance for indoor workouts, without need for a foot pod), personal records.
Swimming features
Other - Time/date, automatic daylight saving time, alarm clock, timer, stopwatch, Weather, Find My Phone
- Auto-goal, intensity minutes, True Up, Move IQ, Toe-to-Toe
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected pay
Affiliate link*Amazon | Garmin
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**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.

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