Key features:

40+ Exercise modes and GPS
Google apps
24/7 Heart rate tracking
All-day activity tracking
Sleep stages & sleep score
Smart notifications

Heart rate tracking

The heart of it all—heart rate powers important data like calorie burn, sleep stages, resting heart rate & more.

Daily readiness score

Do what’s best for your body with a Daily Readiness Score that shows whether you’re ready to work out or should prioritize recovery. Premium subscription required.

Cardio fitness score

Estimate your fitness level using your VO2 Max (how well your body uses oxygen during exercise).

Active zone minutes

Tracks your time in heart rate zones so you get credit when you work harder. Workouts in cardio or peak zones earn double minutes.

Built-in GPS

See pace & distance on your wrist—no phone needed.

Stress management score

See how well your body's handling stress each day. Detailed score breakdown available with Premium.

Up to 6-day battery life

Long battery life means less charging, more living. Battery life varies with use & other factors.

Specifications:

Size

Small – fits wrists 129 – 175mm in circumference

Large – fits wrists 158mm – 209mm in circumference

Sensors & Components

Multi-path optical heart rate sensor
Altimeter
3-axis accelerometer
Built-in GPS + GLONASS
Red and infrared sensors for oxygen saturation
Device temperature sensor
Ambient light sensor
Vibration motor
Microphone
Speaker
WiFi

Battery and Power

Battery life up to 6 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.

Battery type: Lithium-polymer
Charge time: (0-100%): Two hours
Radio transceiver: Bluetooth 5.0

Memory

Saves 7 days of detailed motion data – minute by minute
Saves daily totals for past 30 days
Stores heart rate data at one-second intervals during exercise tracking and at five-second intervals all other times.

Water resistaant

Up to 50 mètres. After getting the band wet, we recommend drying the band.

Materials

This watch includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminium watch case and buckle.

Syncing

The Fitbit app is compatible with most popular phones. To set up and use your Fitbit products and services, you must install the Fitbit app on a compatible device running one of the following operating systems:

Apple iOS 12.2 or higher.
Android OS 8.0 or higher.

Syncing range: Up to 9m

Certain features like smartphone notifications may require Android 8.0+.
Syncing requires Bluetooth® LE and internet connection.
Syncs with Mac OS X 12.2 and up, iPhone 5S and later, Android 8.0 and later.

Fitbit Versa 4