Vault loudspeaker

The Vault 101 Loudspeaker is a type of audio communications device found in Vault 101. Housed in a gray container, the device's central component is a speaker. The facing of the speaker is decorated with the Vault-Tec symbol. Vault residents can operate the on/off function of the device by pressing a touch button on the housing. Volume control is set and can't be altered. This device is used to broadcast the public announcement radio signal. Commonly seen in bedrooms and corridors.

History
A loudspeaker is first seen in the bedroom of the Lone Wanderer's apartment in 2259. An example of a corridor loudspeaker is seen in 2268 near the Cafeteria.

Assumption
I am assuming there is a touch button to operate the device even though there isn't one visible on the housing.