HEPA FILTER: Equipped with a High Efficiency Particulate Air (HEPA) Filter which traps 99.97% of all particles in the air ensuring clean air year round in your home or car. With the combination of HEPA Air Purification, breathe happy knowing this is one of the best assurances for halting air borne pathogens. PURIFICATION: Purifier removes PM 2.5 (air pollutant of tiny particles that reduce visibility and has potential to cause harm to one’s health) . QUIET AND EFFICIENT: powered by the DC Motor the air purifier is whisper quiet. While also being extremely efficient, and with filtration technology to remove harmful air that causes lung cancer and other health issue. LED INDICATION: Always stay confidently updated on the quality of the air while in your car or home by using the LED indicators on the unit. Orange is poor, Green is good, Blue is excellent, Red is time to change filter! AUTO MODE: Worry free operation in auto mode. Let the unit do all the work while it adjusts air purification based on the current air quality. Double turbine: Purify interior air up to 20 times per hour.