This is a "Gaia Memory," an item featured in the TV series "Kamen Rider W," specifically the "Taboo Memory." This item is distributed through black market dealings by an organization called "Museum." It amplifies human mental energy and is used to transform into a monster (Dopant). This "Taboo Memory" possesses the power of taboo. It is used by loading it into a transformation belt, such as the separately sold "Double Driver." ★ Operation confirmed when the memory button is pressed: Four voice lines: ・Taboo ・Claydoll ・Dr. Shinigami ・Terror ★ Does not light up. ★ Batteries from the time are still inside. It appears to have not been played with much at the time, and has relatively few scratches. It has been stored at home for a long time. Thank you for your understanding. #KamenRiderDouble #FuutoDetective