Polar Loop 2
Tech specs 
SizeThickness: 10.8 mm
Width: 20.0 mm
Size: 145-240mm
MaterialSoft Silicone or Polyurethane (TPU) wristband
ChargingCustom Polar USB cable
Battery25 mAH Lithium-polymer battery
Battery lifeUp to 8 days
Water-resistanceUp to 20 metres
Weight38 grams
Sensor3d-accelerometer
Display85 LEDs
Screen size5 X 17 Matrix
ColorsRed, Black, White, Crystal
Other
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
Floors
SleepYes
Heart rate
Vo2Max
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notificationsYes
Other Inactivity alert, Vibration alerts
Links 
View onAmazon | Best Buy | eBay
Amazon US rating3.6 out of 5 stars
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