Can be set on steady red, green, blue or white or can be set to a combination of colors by using the stop button. Set to run through the rainbow of colors and when you see the color you need "hit the button". Or set for changing all the time if you like. An infinite amount of color hues to choose from. Overall the light measures 4" high and is 12" diameter. The table light operates on 4 D batteries (not included) or with optional AC power adapter. Please note the 'pause' button does not function on this unit.