The radio station uses the dweller's Charisma to send broadcasts into the wasteland in order to attract new dwellers. However, sometimes it may attract raiders and deathclaws. This room also supposedly helps raise happiness among vault dwellers. The happiness bonus appears to be a one-time bonus applied when a dweller is assigned to the room. The bonus is removed when the dweller is removed from the radio station. This room requires 20 dwellers to unlock.