Rare Kawai Macro Control for K5000 series

Note: Auction links are affiliate links for which the site may be compensated.
via this auction

via the seller:
"Here is a super rare Kawai Macro Controller, specifically created (for a very short period of time) for the K5000 series synthesizers. These are almost never found on eBay these days. Upon testing this unit, I discovered one of the battery terminals to be corroded. I cleaned it up with contact cleaner, inserted 3 AA batteries and continued to test it successfully on a K5000R. All knobs functioned and controlled the K5000R.

This is wonderful addition for programming the K5000W and K5000R synths- makes it much easier. It has a MIDI IN which you could plug a keyboard controller into and a MIDI OUT/Merge which merges the MIDI IN signal with the control signals of the unit itself."

This is essentially the knob section of the K5000S.