The air becomes so clean that it can help alleviate allergies and asthma symptoms, helping to make beautiful spring days a bit brighter. Every way the wind blows Send powerful gusts of air to the farthest reaches of your room. Inspired by aircraft engines, the aerodynamic pressure system created by our R&D team draws inward from the base and expels air upwards with great force. Smart phone controls let you switch on and off remotely, even when you are away from home. That way you can always be sure to come home to clean air. Covers all angles The 360° cylindrical filter takes in air more efficiently from every direction compared to conventional air purifiers. Its triple-layer design removes particles larger than 0.3μm with a high-density EPA filter from Japanese manufacturer Toray, while an activated coconut carbon filter removes formaldehyde, bad odour and other harmful substances. Replacing the filter is simple and you will be automatically notified via the app when it needs replacing Completely in control Use your phone as a remote to power on, power off, and switch modes. The Mi Home app also lets you monitor home air quality from your phone at any time. Create schedules to power on, power off, switch to Night mode, and more. The strong, silent type Sleep soundly with the ultra-quiet Mi Air Purifier 2. Advanced aerodynamics reduce noise and wind resistance so you can enjoy peace and silence at night. The custom Japanese motor from Nidec is extremely power efficient,consuming 58% less energy than Mi Air Purifier and using only 4.8W on normal mode - that's even better than energy-saving lightbulbs.