Fitbit Versa
Tech specs 
SizeDimensions: 39.35mm x 39.35mm x 11.24mm
Large: Fits wrists 180 mm - 220 mm in circumference
Small: Fits wrists 140 mm - 180 mm in circumference
MaterialThe Fitbit Versa classic band is made of a flexible, durable material similar to that used in many sports watches, and includes an aluminum watch case and buckle.
ChargingUSB
BatteryLithium-polymer
Battery life4+ days. Charge time (0-100%): 2 hours.
Water-resistance5 ATM
Weight38 grams
Sensor3-axis accelerometer, 3-axis gyroscope, optical heart rate monitor, altimeter, ambient light sensor, vibration motor, wi-Fi antenna (802.11 b/g/n), NFC (some versions)
DisplayHi-res touchscreen (up to 1000 nits). Corning Gorilla Glass 3 display. 300x300 pixel resolution.
Screen sizeScreen Size 24.1 mm x 24.1 mm
ColorsComes in a number of different versions
Other- Saves 7 days of detailed motion data – minute by minute.
- Saves daily totals for past 30 days
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepYes (light, deep & REM)
Heart rateYes (Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times)
Vo2MaxYes
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
GPS
Running features
Swimming features
Other - SpO2 sensor that measures blood oxygen levels
- Guided breathing sessions
- Female health tracking
Non-fitness functions 
Smartphone notificationsCall, text and calendar notifications
On-board music storageYes, 2.5GB (300 songs) + access Pandora
Connected payYes
Links 
Affiliate link*Amazon | Fitbit
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