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
Stress & recovery
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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