... )Anion Density:200,0000pcs/cm3, 300,0000pcs/cm3, 400,0000pcs/cm3, 400,0000pcs/cm3(4)Aproval Cert:CQC,UL,CE2. Product ... carbon dioxide. 3), promote metabolism: activate the body of a variety of enzymes, promote metabolism. 4), enhance disease resistance: the ... using air ion concentration testing instrument at the front of the output terminal from the negative ion generator can be accurately measured ...