Bead & Air is a compact air purifier that uses EM (Effective Microorganism) as a biofilter to purify dirty air.The advantages of using microorganisms are as follows:1.Semi-permanent filter: The microorganisms proliferate by themselves, making it unnecessary for you to clean or replace the filter. 2.Naturalistic: There are no chemicals or other harmful substances used in the product. Everything, especially the microorganisms are nature-friendly. 3.Effective filtration: Unlike products that use other filters such as anion, microorganisms can filter the smallest particles, such as fine dust. The fan attached to the side of the machine inhales dirty air, which is filtered by water and microorganisms. Then the machine exhales clean air, making your room or office more pleasant. Bead & Air is also easy to maintain, as all you need to do is pour water through the machine once every 3-4 days, and keep the machine turned on. What makes the product more fascinating is that you do not need to worry about the electric bill, as it only consumes 1.4W.