Kaltech photocatalyst-equipped air purifiers, personal disinfection/deodorization units KL-P01X-W 4 units, with pollen countermeasures KL-P01-K 1 unit KL-P02-K 1 unit, with pollen countermeasures KL-P01-W 4 units I bought these for family and relatives during the COVID-19 pandemic, but they hardly used them, so I'm selling them all together. They disinfect the air near your face using photocatalysis. Please use them for measures against COVID-19, influenza, pollen, and infectious diseases. If used in rotation, they should last for decades.