... FCC,ROHS,Patent OEM ultrasonic humidifier , ultrasonic humidifier with led , ultrasonic humidifier with ionizer JO-633.High Grade Ultrasonic Aroma Diffuser With Humidifier Certifications: ... as a sole negative ionizer. Large negative ions amount 3,000,000 pcs/cm3Remove smoke and poisonous gas, ... be seen immediately by doing the smoke dispelling experiment. 3. Produce a bit of ozone for safe amount. Can ...