NOTE: The GK-2A has received more favourable reviews and stood the test of time better than the GK-3.
Roland GK-2A Hex / MIDI guitar pickup synthesizer driver
For use with 13-pin cable and any compatible guitar synth.
All functions in good working order.
A little adhesive residue on the back.
Comes with guitar jack to lead and some original spacer bars for mounting. All included parts pictured.