100% Ozone Free: Levoit never use UV-C Light or ions which produce trace amounts of measurable ozone, a harmful air pollutant and lung irritant. Enjoy fresh air that's completely natural and healthy to breathe True H13 HEPA Filtration: Only true H13 HEPA takes efficiency. With 3-Stage filteration, our air filter removes 99. 97% of airborne particles as small as 0. 3 microns.Help with releasing allergy symptom Larger CADR Larger Range: The professionally tested CADR reaches 102m³/h, which can purify a room up to 21m² 2 times per hour, bringing fresh air to a larger area Timer and 3 Speed Settings: More convinience with timer. Easily set a timer for 2H/4H/8H to auto shut-off. Choose from low, medium or high fan speeds to address level of air quality, making it suitable for different pollution levels Gentle Night Light: Soft light design on the top brings a comfortable atmosphere. Before sleep, you can choose to turn off the lights, so you can have a undisturbed sleep with purified fresh air.Quiet Sleep Mode: With Sleep Mode, this air purifier only runs at 26dB. Quiet enough for enjoying an easier undisturbed sleep as the air filter eliminates the odours from pets and smokers.