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|First Appearance||Ben 10 Returns: Part 1|
Holo-Viewers are small devices that enable projecting of a hologram.
Holo-Viewers are small, metal disk like objects with a glass-like center from where the hologram projects from. They are small enough to be held in the hand.
Holo-Viewers can be used to project a hologram recording, or they allow communication in real time.