The Ultrahuman Ring AIR in size 8 is a cutting-edge smart sleep and fitness tracker by the brand ultra human. Made from titanium, this activity tracker features a 240 x 240 display resolution, Bluetooth connectivity, heart rate monitoring, and sleep tracking capabilities. With a battery life of up to 6 days and indoor/outdoor measurement options in both decimal and imperial systems, this ring is perfect for tracking your fitness goals, whether you're running, jogging, or simply monitoring your heart rate and sleep patterns. The sleek black design and compatibility with iOS operating systems make it a stylish and practical choice for unisex adults looking to improve their health and well-being.