Vault 101 PA system

The Vault 101 PA system is a radio station broadcasting inside Vault 101

Background
The radio station becomes available to the Lone Wanderer when they first recieve their Pip-Boy 3000 during Growing Up Fast. The station broadcasts instrumental music, vault slogans, information, and radiation level. Inhabitants can hear the station on the vault's loudspeakers and through their Pip-Boy 3000s.