Two devices included in set.

A base plate with a motor, to which one of the eight supplied colored disks can be connected. When starting the electric motor, the colors of the discs merge into one. Required external DC supply voltage 2...6V.

Projector with three primary color light sources. By switching different light bulbs on and off, you can observe the colors produced and the colors produced when they join on a screen (eg white paper). Required external supply voltage 6V.