Battery life of 6+ days. Battery life and charge cycles vary with use, settings and other factors; actual results will vary. We recommend charging your smartwatch every few days to ensure you are always tracking.
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 the last 30 days
Stores heart rate data at one-second intervals during exercise tracking and at five-second intervals all other times
Environmental requirements
Operating temperature: -14° to 113°F
Sensors and components
Multi-path optical heart rate sensor
Red and infrared sensors for oxygen saturation (SpO2) monitoring. Not available in all countries. Not intended to diagnose or treat any medical condition or for any other medical purpose. Intended to help you manage your well-being and keep track of your information. Requires more frequent charging.
Altimeter
3-axis accelerometer
Ambient light sensor
NFC
Built-in GPS + GLONASS
Vibration motor
Speaker (75dB SPL @10cm)
Microphone
WiFi (deactivated, cannot be turned on)
Device temperature sensor (skin temperature variation available in the Fitbit app). Only available in the Fitbit app and only displays variation. Not available in all markets. Not intended for medical purposes. Significant changes in ambient temperature may negatively impact skin temperature tracking.
Display
AMOLED display
Corning® Gorilla® Glass 3
Water resistance
Water resistant to 50m. After getting the band wet, we recommend drying the band because, as with any wearable device, it's best for your skin if the band is clean and dry. Learn more.
Materials
This watch includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminum watch case and buckle. Learn more about wear and care tips here.
Band size
Both small and large sizes included in box.
Small: Fits wrist 5.1 - 7 inches in circumference
Large: Fits wrist 6.5 - 8.6 inches in circumference
What’s in the box
Fitbit Versa 4
Classic band (small & large)
Charging cable
Requirements
Google account will be required. Learn more. 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 16.4 or higher
Android OS 11.0 or higher. See additional tips for Android phones here.
Syncing range: Up to 30ft
Certain features like smartphone notifications may require Android 11+. Check your device compatibility.
Syncing requires Bluetooth® LE, an internet connection and location permissions granted on the phone