Bell 61 Two Way Audio Speaker Unit with Volume Control

Fitted into the entrance panel, this high quality speech unit is used for two-way speech and comes with individual volume control for the microphone and speaker.

 

It is installed in all Bell System audio panels up to ten buttons; this includes the SPA, Bellini, combined door entry and coded access as well as the vandal resistant series. The speech unit can be powered by either 12V AC or 12V DC depending on which telephone model is used.