Announced way back at CES 2016, Motiv’s fitness ring was surprisingly capable and accurate for its tiny form factor. Earlier this year, the startup promised to bring even more functionality to the finger, starting with biometric authentication that uses a wearer’s gait to unlock devices.

This year at the show, the company’s got a handful of additional new features to showoff. Most interesting among them is upcoming addition of mobile payments, via NFC. How, precisely

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