WHAT'S THAT THING ?
In fact, it's simple: it adds 8 trigger outputs to any modules that have a CV output. (and the appropriate connector !)
Like the Ritournelle CV Generator.

Technically speaking, it's just as simple: It convert the 8 bit that are used to generate the CV output of the module, into 8 outputs: 1 per bit !

To do that, it uses a Shift Register circuit (hence the name ...), that converts serial data to parallel data.

This module does not works alown but is only intended to be used as an extension.
Even though it can be easily hackable (DIY friendly). See the doc. below.