Cerebro

Cerebro is a device used by the X-Men to enhance telepathy, most often used by Professor X and Jean Grey.

History
Cerebro was designed and built by Charles Xavier and his friend, later turned enemy, Eric Magnus. Xavier and Jean use it to read and speak to minds at much greater distances than he can on his own. It is also able to detect when a person becomes a mutant.

Background
The Cerebro seen in the series is based on the helmeted version that was upgraded by the Shi'ar and Forge. This is also the last version to be based on that version. Subsequent versions, including the comics, would be based on the large round room seen in the X-Men film series.