Filter made with HEPA media traps 99.97% of dust and pollens down to 0.3 microns. Rinsable pre-filter also catches lint, pet hair and other large pieces. Ionizer emits negative ions into the air that cling to and weigh down airborne particles and germs making them easy to trap. Three-speed fan easily adjusts for multiple levels of cleaning power. Timer can be set for two-, four- and eight-hour operation cycles. Change filter LED indicator informs when to change the filter. Reduces contaminants in the air by reducing smoke, dust and pollen particles, helping to make the air cleaner and better to breathe. Meets and certified AHAM RoHS Compliant. Black. 6½w x 9½d x 151/ioh. Manufacturer's two-year limited warranty.