| 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 unrivalled comfort day and night. It is characterised by sleep tracking and ensures a comfortable and unobtrusive experience. Weighing just 2.4 grams, it is the lightest smart ring on the market. This sleek device combines minimalism with precise performance, allowing 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,… | Compare prices3→ |