Image Item No. Description  x869a  Electric, Train 4.5V Microphone 4 x 4 x 2 with Horizontal Plug Sockets Catalog: Parts: Electric, Train  x869b  Electric, Train 4.5V Microphone 4 x 4 x 2 with Vertical Plug Sockets Catalog: Parts: Electric, Train  55455  Electric, Train 9V RC Train Base 6 x 30 with IR Receivers Catalog: Parts: Electric, Train  55455c01 (Inv)  Electric, Train 9V RC Train Base 6 x 30 with IR Receivers and Battery Compartment Catalog: Parts: Electric, Train  55457  Electric, Train 9V RC Train Base, Battery Compartment Cover Catalog: Parts: Electric, Train  55461c01  Electric, Train 9V RC Train Base, Battery Holder Catalog: Parts: Electric, Train