Ultrahuman Ring Air Size 12 Space Silver

The Ring Air Size 12 Air Silver tracks heart rate, sleep, steps, and skin temperature for all-day wellness monitoring.

Sized for a standard ring fit, this Ultrahuman fitness tracker suits users who want to monitor health trends without wearing a watch. The lightweight band is made from fighter jet grade titanium reinforced with tungsten carbide carbon coating, while the inner surface uses medical-grade hypoallergenic epoxy resin for comfort during continuous wear.

Bluetooth v5.0 connectivity pairs the ring with iPhones running iOS 15 or later and Android devices running Android 6 or later. The battery lasts 4 to 6 days on a full charge, supporting uninterrupted tracking of circadian rhythm, temperature-based ovulation prediction, caffeine window detection, AFib detection, and sleep. Water resistance up to 100 metres for up to 12 hours means you can keep it on during workouts, handwashing, or swimming.

Model 170129 in silver comes with a 1 year manufacturer's warranty.