550ML Remote Control Ultrasonic Air Humidifier Essential Oil Diffuser Aroma Lamp Aromatherapy Electric Aroma Diffuser Mist Maker This aroma diffuser uses ultrasonic waves to instantly vaporize water and essential oil (Only 100% natural essential oils) in the tank, to produce a cool, dry fragrant mist. how to use? LIGHT Button Press first： turn on the LED light, color changes automatically Press second: set the color on Press third: select dim or bringht color MIST Button Press first: 1 hour timer Press second: 3 hour timer Press third: 6 hour timer Press four: continuous mist coming out Cool mist come out from air humidifier, eshtablish a healthy lifestyle for yourselves and familys, you can relax or do a Spa or Yoga when you have leisure with it, the humidifier will help to refresh air and moisturise your skin.Maintenance instruction: Add a small amount of warm kitchen detergent remover. Clean with water. use swab to wipe gently, and then use cleaning cloth to dry it lightly Note: Be sure to use a mild detergent if you want to clean the humidifier Don't fill water over the Max line at any time. Don't switch on power when the tank is empty. Clean regularly as per Maintenance instruction to avoid malfunction. ​ ​