The Black Smart Ring Size 10 for Mens is a sleek and advanced activity tracker designed for men who are into running and jogging. With features like Bluetooth connectivity, distance traveled tracking, data review, smartphone compatibility, sleep tracking, and heart rate monitoring with blood O2 levels, this smart ring provides comprehensive fitness monitoring in a stylish black color. The average heart rate tracking feature allows users to stay on top of their cardiovascular health while engaging in their favorite physical activities.