This is a lightly used little synth. I played it out at some local shows a few years back. It's in excellent condition, just needs a 9V battery or a 9VDC Power Supply (not included).

Description from manufacturer:

The Critter & Guitari Bolsa Bass synthesizer features six modes of rich, elemental bass sound, a sequencer and full MIDI capabilities. The six synthesis modes are:

Circle Ramp

Sawtooth Ramp

Analog Style

Sweep Filter

FM Pad

Bass Delay

The sequencer lets you quickly create bass lines with the touch of a button. You can even record and playback knob adjustments for things like filter sweeps and changes in delay time or tuning! With MIDI IN and OUT jacks you can synchronize your sequences with other devices. The Bolsa Bass also sends and receives note messages so you can use it as a sound module or simple controller.

The entire keyboard may be tuned over a 1-octave range by turning the knob second from right. Volume is controlled by the right-most knob. The function of the remaining two left knobs depend on what mode is selected. The synthesizer modes provide elemental monophonic bass sounds, great for all kinds of musical scenarios. From classic filter sweeps to simple and pure tones, lush FM, and even a stretchy tuned delay which makes great string-like drones.