The Ultrahuman Ring AIR in size 10 is a water-resistant activity tracker made from titanium, featuring Bluetooth connectivity, heart rate monitoring, and sleep tracking capabilities. Designed for both indoor and outdoor use, this unisex ring is perfect for tracking fitness activities such as running and jogging. With a sleek raw titanium color and a comfortable fit on the hand, this Ultrahuman ring is an advanced tool for monitoring and improving your health and wellness in style.