Titanium dioxide coated screen boosts UV performance. Ultraviolet bulb helps remove airborne germs, bacteria and other microorganisms. HEPA filter traps 99.9% of dust and pollens down to 0.3 microns. Rinsable pre-filter catches lint, pet hair and other large particles. Charcoal filter absorbs airborne odors. Ionizer emits negative ions into the air that cling to and weigh down airborne dust, pollens and germs, making them easy for the filter to trap. LCD air quality monitor display. Intellisense control system senses air quality and automatically adjusts fan speed to the optimal setting for current dust levels. Change filter indicator. Remote control lets you easily manage settings from across the room up to 25 ft.