1. Mesh Pre-filter to catch large particles and pollutants.2. UVA LED lights combined with PCO filter to kill harmful airborne bacteria and viruses.3. Carbon Filter captures airborne allergens large dust, pollen, smoke, and VOC gas.4. Negative ionizer generates millions of negatives ions to the flow of clean air.5. A pair of quiet fans with three-speed control.6. 0.5/2/4/6 hours auto-timer.7. Energy efficient and inexpensive to operate.8. Power supplied by an AC Adaptor with output DC12V.9. New UVA LED technology provides long life, so light does not need to be replaced.