One of the best CV/Gate-Sequencers I know. It can record in step mode or real time. There are four sequences which can be recorded. It is possible to edit sequences, which were recorded in step mode. Also external clocking is basically possible as there is an output and input for its internal processor clock. This clock has unfortunately something like 1000 tics per beat. So it is only useful for combining two CSQ-600s. But it has at least a DIN-Sync out. So one can clock a TR-808 or similar with the CSQ.
On quite unknown fact: the CSQ-600 and CSQ-100 share the same microprocessor and firmware. That means: a CSQ-100 is missing only some hardware parts (mostly switches and diodes), but it can basically provide all features of the big CSQ-600!