USB Air Purifier: Our USB Air Purifier helps to remove 99.95% of contaminants including pollution, allergens, dust, pollen, and more! Breathe easier with Wagan Tech! Features: Wow, where do we begin?! HEPA Air Filtration, UV-C disinfecting light (germicidal lamp), Air ionizer, USB powered, all enclosed in a sturdy yet sleek aluminum case that fits in a cup holder! Who it's for: You, Me, Everyone! If you like breathing clean air with reduced allergens, dust and pollution, then this is for you. If you prefer dirty air with pollen and other contaminants, then this air purifier is not for you! Where can I use this? Being USB powered, you can use this anywhere there is a USB port; in your car, on your computer desk, dorm room, in a hotel room, in the office, bedroom, kitchen, man cave, she shed, or in your RV basically anywhere it is needed! Filter Orientation: Universal fitment - No direction (Bi-directional) HEPA H13: HEPA, or "High Efficiency Particulate Air" is a standard that requires a filter to remove at least 99.97% of all particles 0.3 microns (micrometers) in diameter; for example: in 10,000 particles, only 3 particles may pass through the filter. The H13 is the second highest HEPA rating and is considered to be medical-grade HEPA filtration. UV-C (from FDA.gov): UVC radiation is a known disinfectant for air, water, and nonporous surfaces. UVC radiation has effectively been used for decades to reduce the spread of bacteria, such as tuberculosis. For this reason, UVC lamps are often called "germicidal" lamps. UVC radiation is commonly used inside air ducts to disinfect the air. This is the safest way to employ UVC radiation because direct UVC exposure to human skin or eyes may cause injuries, and installation of UVC within an air duct is less likely to cause exposure to skin and eyes. Anionization: Air ionizers are "invisible air cleaners". They work by producing and releasing negative ions into the air. The negative ions attach (bond) to positively charged part