Xiaomi's new Mi Smart Band 4 is an affordable fitness tracker that comes with a colour display and a massive 20-day battery life. But is it good enough for you? Today, we'll tell you. We tested the Mi Smart Band 4 to find out if it's the perfect budget fitness band for most people. In this video, we will tell you everything good and bad about our experience with Xiaomi's latest fitness band in the country. In case you're looking to buy the Mi Smart Band 4, make sure you don't miss this video.