The Oura Ring is a fitness wearable that could tell you if you have Covid-19 | British GQ
LYUMO NFC Multi-function Smart Rings Magic Wearable Device Universal for Mobile Phone, NFC Smart Ring, Multi-function Smart Ring - Walmart.com
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Oura Ring Review: Worth the Hype | WIRED
A new Smart Ring patent from Google hints of using their Soli Radar technology to control mobile devices with Hand Gestures - Patently Apple
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Smart Ring Wearable Technology Waterproof Unisex NFC Phone Smart Accessories for Couples 6-13 - Walmart.com
Smart Ring: An Introduction to the Technology - Sky Labs