The enhancer consists of one storage holodisk, a microfilament cord, headgear, and an optical sensor that is placed over the user's right eye. When used, an optical flash transmits an entire dictionary into the user's memory, permanently improving the user's Speech skills.
It is a reward in getting to learn about Vault City and education from Mrs. Bishop.
A Chosen One of any gender can ask Mrs. Bishop about the G.E.C.K. or Vault 13 if they have not encountered those yet, and then ask her about Vault City. They may then, if Strength or Charisma is 6 or more, accompany her to her room on the top floor of the Shark Club. If one has sex with her long enough to reach the pillow talk stage, asking about Vault City with 9 INT will grant this module.