These are the power components for a 9V lego train, originally from the Lego Set 7897 Passenger Train. Let me know if you have any questions. It includes the following pieces: 55455c01(inv)        White Electric, Train 9V RC Train Base 6 x 30 with IR Receivers and Battery Compartment, Complete Assembly x1688          Black Electric, Train Motor 9V RC Train (motor only, no attached wheels) 40529c01          Black Electric, Train 9V RC Train Remote Control, Dark Bluish Gray Bottom, Yellow Buttons