1U version of the 568A QSTS Assistant
Accessory for 568 trigger sequencer
The QSTS ASSISTANT MODULE expands the basic M 568 by more inputs and outputs. The four top jacks are reset inputs to have the four sequencer rows of the 568 be reset independently from external sources. The Lower eight jacks provide trigger outputs, which can be assigned to selectable positions - two on each row of the 568.
These merchants probably sell this module. Huh?