This 4” diameter light base has 20 LEDs with 5 LED lights in each color: red, blue, green and white. It has 5 color-changing modes or can be set on the color of your choice. Uses either 3 x AA batteries (not included) or a 4.5V D/C adapter (sold separately). 15+ hour battery life. Includes removable plastic lid. Designed for use with our Turning Base.