Xiaomi Mi Band 3 is a multifunctional device that allows you to track your fitness activity, monitor your heart rate, and even help you sleep better. This fitness tracker is water-resistant, so you can wear it while swimming or in the shower. The OLED display is easy to read, even in bright sunlight. The Mi Band 3 also has a long battery life, so you don't have to worry about charging it every day. With its stylish design and affordable price, the Mi Band 3 is a great choice for anyone who wants to improve their health and fitness.