The Xiaomi Mi Air Purifier 3H is an upgraded version of the Mi Air Purifier 2S. It removes up to 99.7% of particles, hair, dirt, smoke, and other pollutants from the air. The Air Purifier 3H features a HEPA filter that can clean the finest particles from the air. It can purify up to 380 m³ of air per hour, providing 22% more performance than the Purifier 2S. In addition to an automatic mode, which uses a dedicated laser to detect particles in the air, the Air Purifier 3H operates particularly quietly thanks to its night mode. There are a total of six different modes to choose from. The high-contrast OLED touch display shows the current air quality, the time, and all other information. Since the Purifier 3H has no buttons, the air outlet is not round like the Purifier 2S, but instead is a full surface outlet. The Purifier 3H is compatible with smart home systems such as Alexa and Google Assistant and can be controlled remotely via the Mi Home app.