... small particles,Creating a relaxing atmophere in any room,Suitable for use with essence,Approval PSE,CE,GS,UL,KC Ultrasonic ... diffuse liquid into small particles,2.Do not need any heating element or chemicals,3.Creating a relaxing atmophere in any room ... tank and add a few drops of essential oil5.Suitable for use with essence,6.PSE,CE,GS,UL,KC certificate7 ...