Hologram

A Hologram is a device used in the Star Wars theme, that can be used to communicate with others over a long distance. Two parts have been made of holograms, and so this may refer too:
* Part 46212pb01 - Exclusive to 6211 Imperial Star Destroyer.
* Part 3062bpb37 - Exclusive to 7964 Republic Frigate and 10221 UCS Super Star Destroyer.