Polar Loop Crystal
Tech specs 
SizeThickness: 10.8 mm
Width: 20.0 mm
Size: 145-240mm (5.7-9.4")
MaterialSoft silicone wristband with Swarovski crystals
ChargingUSB
Battery25 mAH Lithium-polymer battery
Battery lifeUp to 6 days
Water-resistanceIPX7 (splash and sweat proof)
Weight38 grams
Sensor3d-accelerometer
Display85 LEDs
Screen size5 X 17 Matrix
ColorsWhite
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, alarm, vibration alerts
Links 
View onAmazon | eBay
Amazon US rating3.9 out of 5 stars
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