51970 21 Pin Adapter board plus Aux 3/4, 2 x servo, smoke unitWith this expansion board you can easily expand your LokPilot or LokSound decoder (with 21MTC interface!): All you need to do is to plug the decoder onto the expansion board and benefit from using 4 additional function outputs (AUX5 through AUX8) for lighting effects, coupler etc. In addition, you are able to connect 2 RC servos! The 5V voltage needed (for this) will be also provided. The highlight of the expansion board is surly the control