The Ravensburger GraviTrax POWER Controller brings interactive control to your marble run. With this electronic accessory, you can actively control compatible marble run elements of the POWER series at the push of a button. Three colored channels in red, green, and blue are available for this purpose, communicating via a 2.4 GHz radio signal. Through the targeted use of the controller, you determine the course of the marbles yourself and create dynamic tracks. The set is suitable for marble run fans aged 8 and up and can be flexibly integrated into existing GraviTrax systems. Instructions are included.