Ultrahuman Ring Air Size 14 Aster Black

The Ring Air Size 14 Aster Black tracks heart rate, sleep, steps, and skin temperature for everyday health monitoring.Sized for a 23mm inner diameter, this Ultrahuman smart ring fits users who prefer a lightweight, screen-free wearable for continuous tracking. Its titanium shell reinforced with tungsten carbide carbon coating and hypoallergenic epoxy resin interior make it comfortable for all-day and night wear, including sleep tracking.Compatible with iPhones running iOS 15 or later and Android devices running Android 6 or later, the ring syncs data via Bluetooth v5.0 to the Ultrahuman app. The battery lasts 4 to 6 days on a full charge, reducing the need for frequent recharging. Water resistance up to 100 metres for 12 hours allows use during swimming or showering.Model 170111 in black comes with a 1 year manufacturer's warranty.