Ultrahuman Ring Air Size 05 Aster Black

The Ring Air Size 05 Aster Black tracks heart rate, sleep, steps, and skin temperature for all-day health monitoring.

This smart ring suits users who want discreet, continuous tracking without the bulk of a smartwatch. Its lightweight fighter jet grade titanium construction and hypoallergenic epoxy resin inner coating make it comfortable for everyday wear, including during sleep and exercise.

Bluetooth v5.0 connectivity links the ring to 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, reducing the need for frequent charging. Water resistance up to 100 metres for up to 12 hours allows for showering and swimming without worry.

Model 170103 in black comes with a 1 year manufacturer's warranty.