Used Fitbit Fitbit Versa 3, Midnight/Soft Gold

Midnight/Soft Gold Aluminum

Built-in GPS + GLONASS
Gyroscope
3-axis accelerometer
Altimeter
Wi-Fi (802.11b/g/n 2.4GHz)
Ambient light sensor
Microphones
Speaker
NFC
Vibration motor
Optical heart rate sensor
Device temperature sensor (skin temperature variation available through Premium only)

Battery life up to 6+ days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Use of the always-on display feature will require more frequent charging. We recommend charging every few days to ensure you're always tracking.

Battery type: Lithium-polymer
Charge time: (10-80%): Approximately 40 minutes
Fast charging: 1 day of battery life in 12 minutes
Radio transceiver: Bluetooth 5.0

Saves 7 days of detailed motion data - minute by minute
Saves daily totals for past 30 days
Stores heart rate data at 1-second intervals during exercise tracking and at 5-second intervals all other times

Water resistant to 50 meters. After swimming or 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. We do not recommend wearing Fitbit Versa 3 in a hot tub or sauna

Give your wrist a rest by taking the band off every now and then. If the band gets wet or you sweat in it, remove and completely dry the band before putting it back on.

Versa 3 includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminum watch case.

Operating temperature: -4 Degree to 140 Degree F
Maximum operating altitude: 28,000 ft

The Fitbit app is compatible with most popular phones and tablets. 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 7.0 or higher
Syncing range: Up to 30ft
Certain features like smartphone notifications may require Android 7.0+.
Syncing requires Bluetooth LE and Internet connection.

Syncs with Mac OS X 12.2 and up, iPhone 5S and later, iPad 5 gen. and later, Android 7.0 and later.
Music control via Bluetooth Classic on Android and Bluetooth LE on iOS devices.