Ozone release: The principle of ozone generator is to use high voltage electricity or chemical reaction to decompose some oxygen in the air and polymerize into ozone.O3 eliminates odors and destroys viruses.Deodorants can eliminate odors in bedrooms, homes, hotels, offices, kitchens and cars, such as cigarette smoke, pet odors, food odors in cooking and other irritating air. Negative Ion Machine: The air filter can release up to 1 million units of negative ions per second to purify and refresh indoor air at approximately 166 square feet, providing you with clean air cleaner, safer and healthier than your complete health. Automatic and manual operation: In automatic mode, this air purifier is controlled by smart sensors. When it finds someone in the room, it starts and stops the cycle automatically. In manual mode, it eliminates strong odors or generates odors only in uninhabited areas. (Note: Please read the instructions before using manual mode) Save your electricity bill: the ozone generator is compatible with the adapter. The adapter accepts 100-240V voltage and only outputs 24V voltage, which saves electricity bills and provides safer operation than other machines. Simply press the setting button for 3 seconds to add an easy-to-use night function to turn off the display and indicator when you fall asleep. No need to replace the filter and ultra-quiet, the integrated nano activated carbon filter can be used for up to 15 years. Never worry about buying and replacing expensive air filters. Using quiet operation below 20dB (natural state), this air filter can keep your air clean without disturbing you when you are working or sleeping.