Energy Efficient Air Purifier with USB Booster and Adapter Captures airborne allergens like pollen, smoke, dust, pet dander by using 3M filtrate electrostatic particulate filter Captures airborne allergens of any particles as small as 0.1 microns by using 3M filtrate electrostatic particulate filter Absorbs smoke, harmful gases (formaldehyde, toluene and carbon monoxide) and other offensive odors by using charcoal filter Generates millions of negatives ions to the flow of clean air Super quite fan prompts a better airflow without destructive noise Natural curative aroma beads disperse soothing fragrance to enrich the purified and ionized air Energy efficient and inexpensive to operate Power supplied by a USB adapter in connection with a USB booster Power input types optional: car lighter adapter and main AC adapter (all not included)