Vault 101 PA system

The Vault 101 PA System (PA - public announcement) is a radio station broadcasting inside Vault 101. The station broadcasts instrumental music, propaganda slogans, and motivational statistics about the Vault including one stating that the chance of a systemic-wide failure is over 1,400,000 to 1. The station can be received through a speaker in the bedrooms of residents or through their Pip-Boy 3000s.

History
After your father leaves the vault, this station will tell all vault members to stay inside their rooms and not interfere with security.