The Memory Projector is a device that features in He-Man and the Masters of the Universe. It was invented by Man-At-Arms and consists of a headset attached to a screen by a cord. By wearing the headset, people can project their memories onto the screen and watch them like a movie.
Queen Marlena once used the Memory Projector to replay memories of her arrival on Eternia. Teela then used it to replay her earliest memories, which inspired her to go on a quest to learn more about her past.