The Parameter Smart Ring Health Tracker is a sleek and stylish device made from stainless steel and metal, designed for both men and women interested in tracking their fitness and sleep patterns. With features such as heart rate monitoring, calorie tracking, and distance tracking, it provides valuable insights into your daily activity levels. The silver color and size 12 make it a versatile piece that fits comfortably on the finger, making it easy to use with both iOS and Android operating systems. The innovative design of the Magloop R06 model ensures a secure fit while providing accurate measurements for a comprehensive understanding of your health and wellness.