| Introducing the Ultrahuman Ring Air, the ultra-comfortable fitness wearable. With its notch-free, ultra-thin design and smooth inner shell, the Air Ring offers unparalleled comfort day and night. It features sleep tracking for a comfortable and unobtrusive experience. Weighing only 2.4 grams, it is the lightest smart ring on the market. Combining minimalism with precise performance, this sleek device allows users to effortlessly monitor sleep, movement, heart rate, heart rate variability and skin temperature.The sleep index was derived to help you understand the different sleep stages such as deep sleep, REM sleep, light sleep and wakefulness. During different sleep stages, various metabolic … | Compare prices3→ |
