... liquid into small particles,Creating a relaxing atmosphe Ultrasonic Humidifier Aroma DiffuserHigh frequency ultrasonic diffuse liquid into small particles,Creating a ... for use with essence,Approval PSE,CE,GS,UL,KC Ultrasonic Humidifer Aroma Diffuser1.It utilizes a high frequency 1, ... 700,000 times per second ultrasonic diffuse liquid into small particles,2.Do not need ...