Hoover Air Purifier 600, WH10600 The Titanium Dioxide coated screen boosts UV effectiveness by helping to remove 99 9% of germs UV Bulb helps to remove airborne germs, bacteria, and other microorganisms UV/Ti02 on/off controls are for use during flu season and can also be used all year round Rinsable Pre-filter to catch lint, pet hair, and other large particles, HEPA media filter to capture the smallest particles IntelliSense Control system senses air quality and automatically adjusts fan speed