Bissell Air220 air purifier's activated carbon filter captures odors from cooking, smoke, pets, and other common household odors The air purifier incorporates 3 stages of filtration The activated carbon filter and a high‐efficiency plus pre-filter of the air purifier captures over 99% of particles Bissell air purifier features Automated CirQulate system technology which monitors and provides colorcoded indoor air quality feedback and adjusts fan speed The air purifier features whisper quiet operation and automated night mode contribute to a peaceful sleeping environment The sleek design, front filter access, intutitve controls and discreet cord wrap of the purifier blends into any home The air purifier provides you two years warranty Bissell air purifier comes with Air220 unit, activated carbon filter (inside unit), HEPA, pre filter (inside unit), user guide, and safety instructions The air purifier also features VOC sensor measures pollutants and odors Noise level: 34dB