This smart ring claims to be the lightest ever — and the first

Circular claims to have created the world's thinnest and lightest smart ring — as well as the first to use haptic navigation.

Iris smart ring Elevate style. Embrace self-awareness. by Assim & Nino — Kickstarter

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The first smartring has an LED screen, tells time, and accepts calls

Iris smart ring Elevate style. Embrace self-awareness. by Assim & Nino — Kickstarter

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Does This Smart Ring Really Fulfill Its Promises?

I Wore A Smart Ring For A Month And This Is What Happened

【Multiple Functions Health Tracker】The smart ring has multiple functions, which can monitor your heart rate, temperature and blood oxygen at any time,

Smart Ring, Waterproof Ceramic Ring, Universal Wearable BT Connection Health Tracker for Mobile Phone, Sports Ring with Heart Rate Monitor, Sleep

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Oura (Generation 2) review