Ultrahuman Ring Air Review: A Subscription-Free Smart Ring

This unobtrusive smart ring tracks your sleep and activity to nudge you toward healthier habits—no subscription needed.

Sizes: Available in 7 sizes from 6-12 Lightest wearable: As light as 2.4 grams Build to last: Made with the robustness of Fighter Jet grade Titanium

Ultrahuman Ring AIR - World's lightest Sleep-Tracking Wearable, HRV, Heart Rate & Temperature Monitoring, Track Sleep, Movement & Recovery, Water

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