The Xiaomi Mi Air Purifier 3H is a further development of the Mi Air Purifier 2S. It removes 99.7% of particles, hair, dirt, smoke or other harmful substances from the air. The Air Purifier 3H uses a HEPA filter that can clean the finest particles out of the air. The Air Purifier 3H cleans up to 380 m3 per hour and thus offers 22% more power than the Purifier 2S. In addition to an automatic mode, in which a dedicated laser detects the particles in the air, the Air Purifier 3H works particularly quietly thanks to the post-mode. A total of six different modes can be selected. The high-contrast OLED touch display shows the current air condition, time and all other information. Since the Purifier 3H has no keys, the air outlet is not round as with the Purifier 2S, but is full-surface. The Purifier 3H is compatible with smart home systems like Alexa and Google Assistant and is remote controllable through the Mi Home App.