How does the Led Writing Board work?

Light-emitting principle: Led writing board is designed with special led lights inside. When power on, the fluorescent powder on the LED Writing Board reflects the light, generating brilliant neon effect. You can control the color changing by pressing the button on side of the LED Writing Board, which changes the interval as well as the frequency of the light.http://www.ledwritingboard.cn/products/t5-led-writing-board.html