When you turn this 15" Diameter LED Serving Tray on it is set on a color changing mode. You can keep it in that mode or when it reaches a color that you want, just push the button and it will hold on the color until you push the button again.
The tray will go thru a spectrum of light blue, green, red, dark blue, blue/white and pink/purple. The photo shows four of the colors you can get from just one tray.
The tray has a 11.5" serving platform It runs on rechargable batteries. The batteries and Charger are included. It will run for 9 hours on a charge.