O-air is a fashionable, small and intelligent air purifier that can be placed in cars, bedrooms, living rooms, offices and other places. It has multiple functions such as filtering PM2.5, removing peculiar smell, ultraviolet sterilization, etc. It can be set to automatically alarm and start operation when the air quality exceeds the standard. O-Air can view and monitor air quality, switch on and off remotely, control wind speed, etc. through mobile phones. In addition, it also has a wireless charging function.