Garmin Vivosmart 3
Tech specs 
SizeWidth: 18.5 mm
Thickness: 9.8 mm
Length (small/medium): 197 mm
Length (large): 223 mm
Circumference (small/medium): 122-188 mm
Circumference (large): 148-215 mm
MaterialSilicone
ChargingUSB
BatteryLithium battery
Battery lifeUp to 5 days
Water-resistanceUp to 50 metres (5 ATM)
WeightSmall/medium: 20.4 g; Large: 21.5 g
Sensor3 axis-accelerometer, barometric altimeter, heart rate monitor, vibration alert, ambient light sensor
DisplayOLED
Screen size9.6 mm x 19.2 mm, 64 x 128 pixels
ColorsBlack, Purple
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepYes
Heart rate24/7
Vo2MaxYes
UV exposure
Skin temperature
Galvanic skin response
GPS
Running featuresAccelerometer (calculates distance for indoor workouts, without need for a foot pod), personal records.
Swimming features
Smartphone notificationsYes
Other - stress monitoring
- automatic rep count in the gym
- Clock, music control, auto goal, move bar
Links 
View onAmazon | Garmin
Amazon US rating3.3 out of 5 stars
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