Ultrahuman Ring Air Size 06 Aster Black

The Ring Air Size 06 Aster Black tracks heart rate, sleep, steps, and skin temperature for users seeking a discreet fitness companion.Sized for a standard US ring size 6, this Ultrahuman smart ring fits comfortably on the intended finger and is crafted from fighter jet grade titanium with a tungsten carbide carbon coating. The hypoallergenic epoxy resin inner surface supports all-day wear, while compatibility with iPhones running iOS 15 or later and Android devices running Android 6 or later ensures broad device support.Bluetooth v5.0 connectivity enables seamless syncing with the Ultrahuman app, allowing you to monitor circadian rhythm, temperature-based ovulation prediction, caffeine window detection, and AFib detection. The battery lasts 4 to 6 days on a full charge, and the ring is water resistant up to 100 meters for up to 12 hours.Model 170104 in black comes with a 1 year manufacturer's warranty.