Ultrahuman Ring Air Size 09 Aster Black

The Ring Air Size 09 Aster Black tracks heart rate, sleep, steps, and skin temperature for all-day wellness monitoring.

This smart ring suits users who want continuous health insights without the bulk of a smartwatch. Its slim, screen-free design is comfortable enough for overnight wear, making it ideal for sleep tracking and daily activity monitoring.

The fighter jet grade titanium shell is reinforced with a tungsten carbide carbon coating for durability, while the hypoallergenic epoxy resin inner layer supports comfortable long-term use. The ring is water resistant up to 100 metres for up to 12 hours, so it can be worn during swimming or showering. Bluetooth v5.0 connectivity links the ring to iPhones running iOS 15 or later and Android devices running Android 6 or later. A single charge lasts 4 to 6 days, reducing the need for frequent recharging.

Model 170106 in black comes with a 1 year manufacturer's warranty.