Helios Smart Ring
Tech specs 
MaterialAnti-allergic, scratch free polymer material
Battery life24 hours
RechargeableYes (Micro USB). Lithium Ion Polymer battery
Water resistanceWater and dust production
SensorsHigh accuracy UV index sensor
Functions 
Activity trackingNo
NotificationsNo
SOS buttonNo
OtherVitamin D coach, Sunlight coach, Daylight coach
Links 
View onHelios Smart Ring
Amazon US rating
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