The Cudis AI 001 Ring in black size 8 is a new and sealed ceramic activity tracker designed for unisex adults who enjoy running and jogging. It features a variety of functions such as setting goals, tracking distance traveled, monitoring ECG heart rate, and monitoring sleep. The ring is wireless and connects via Bluetooth, making it convenient for tracking fitness progress in real-time. With a rechargeable battery and water-resistant design, the Cudis AI 001 Ring offers a sleek and practical way to monitor and improve your fitness.