Releases 8,000,000,000 pcs/cm³ of negative ions. Effectively removes smoke, dust and PM2.5 air pollutants Increases concentration, boosts metabolism and relieves fatigue Certified: CE, FCC, RoHSNegative ion concentration: 8.0 million Pcs/cm3Ozone concentration: ≤0.02PPMUse range: <15m³Application area: Interior, Cars