Eating clean is better for the body, and the same applies to the air we breathe. The Mi Air Purifier Max offers a high 1000 cubic meters per hour Clean Air Delivery Rate (CADR). It takes just 3 minutes to circulate purified air in a 21 square meters room. Efficient air filter comes with 3 layer filter effectively clean PM2.5 and other common harmful substances. You will have a comfortable living / learning / office environment with this Smart Air Purifier.