Holmes HEPA-type desktop Air Purifier has a dual-position slim design that is perfect for table or desktop use. It can be placed vertically or horizontally to best suit your space. Plus, its highly efficient HEPA-type filter is fortified with Arm & Hammer Baking Soda to help absorb and eliminate common household odors. HEPA-type filter helps remove up to 99% of airborne particles as small as 2 microns from the air passing through it; Filter is enhanced with Arm & Hammer baking soda to help eliminate common household odors; 3 speed settings provide options for different conditions; Optional ionizer assists in particle removal; Slim dual positioning design - can be placed vertically or horizontally to best fit your space; Recommended for rooms up to 109 sq ft (10ft x 11ft); Smoke CADR: 70; Filter: HAPF30.