press the "light" button again to change color it uses vibrating sound waves to create a soothing, scented mist. very silent as it is located at the back of the building. i think they'd lost four in a row, if i had it right. my advice to you is to make a decision about what kind of fan you want to be and then stick with it. i can though see one big error. more over dining room and living room decorating ideas has viewed by 605 visitor. 