ATWFS Mini Ionic Air Purifier Ozone Smart Cleaner Portable Oxygen Concentrator with Night Light Reduces odors and adsorbs volatile airborne pollutants and other unpleasant smells in closed rooms and offices. Eliminates formaldehyde, making the air we breathe healthy and safe. Timing(30 minutes) for ozone smart clean to sanitize the air as it passes through the purifier, killing disease causing germs, viruses, bacterias and other micro-organisms. Removes allergens, pollen, mould, mildew, cigarette smoke etc to prevent or reduce respiratory symptoms and infections. Whisper quiet fan works so quiet that you won't even notice it running,silently cleans and sanitizes the air around you.