The LIVUP SMART RING HEALTH TRACKER in black, size 9 is a brand new activity tracker suitable for indoor and outdoor use. It features a rechargeable battery with a life of more than 7 days and provides various measurements such as heart rate, steps, sleep quality, and SpO2. Compatible with Android operating systems, this ring offers features like data review, smartphone compatibility, and water resistance. With its wireless Bluetooth connectivity, it allows users to set goals and monitor their fitness progress in English language. Ideal for unisex adults engaging in activities like gym training, walking, exercise, and running, this LIVUP ring is a convenient tool for tracking and improving health.