Electronic selector module with 4 stereo channels, with luminous indicator of the channel number selected. It is designed to install 4 channels combined with controls from the Compact series. It has a Mute order, pushbutton which momentarily annuls the volume of the selected channel.
It includes a Scan pushbutton which permits a second Scan line for SONELCO tuners.
It is switched on by means of the control it is associated with and when it is switched off, it maintains the memory of the last channel selected.