OriGlam&reg; 100ML Color-Changing Air Humidifier 2.4Mhz Ultrasonic Aroma Diffuser This portable 100ml color-changing air humidifier aroma diffuser comes with a table lamp type upper lid, looks very grace. Ultrasonic transducer vibrating at a frequency of 2.4 million times per second makes the molecule of water and essential oils so tiny that it is easily absorbed by our body. It uses 3 LED to produce 7 colors, and each color has two mode, that's light color and dark color. More choice for you select what you like freely. Suitable for home, living room, bedroom, office, etc.