From the eBay description:
This unusual piece showing the Josephine Baker's legendary, dancing tap on illuminated stage. The Art Deco scenography and the stage are made in pink metallic paint aluminum, but the surface stage is polished like mirror (she used that kind of floor to achieve special effects in her dance movements). The stage has a little bulb in the corner. The rare mechanism is electromechanical. Also, this Piece has something like a microphone or speaker that it connected on back the stage (has a very long cord).
Here is the full eBay listing with many very large photographs of this Art Deco style dancing Josephine Baker automaton