Roland V-Bass modeling unit, with GK-2b detachable pickup. Over 200 factory and user programmable modelled instrument, amp, and effects combinations, covering everything from a vintage P-bass through a B-15, to a decent "Jaco" fretless that's always in tune, to a Moog pedal bass, to some truly wacky synth sounds. Amps and effects, too, and no tracking issues whatsoever--this is modelling, not MIDI. Normal playing/gigging wear, but in good condition--the only problem I've ever had is that the plug on one end of the 13-pin cable is a little wobbly. I'm just not using this thing anymore since leaving my progressive trio. Comes with a padded Carvin carrying bag. Asking $650 plus shipping, or will drop $50 off if you buy it in combination with the Warmoth Jazz 5 I have the pickup installed on.