MOOG LIBERATION VINTAGE KEYTAR SYNTH

via this auction

See the auction for tons of pics.
The seller also has a Moog Source listed here.

"This particular example, serial number 3020, is in excellent cosmetic condition and includes the original case and original Moog interface, serial number 3284, and the corresponding cable. The Liberation was Moog's unique strap-on keytar style portable performance synthesizer and most often compared to Moog's other two-oscillator synth, the Moog Rogue."

The Liberation is a dual-oscillator monophonic analog synth and although comparable to Moog's other two-oscillator synths such as the Rogue (already mentioned above) and the Realistic Concertmate MG-1, the Liberation is actually most similar to Moog's most popular dual-vco synth, the Prodigy.

The actual synth controls of the Liberation are nearly identical to the Prodigy, with the addition of Ring Mod, Noise and Polysynth controls in the Mixer section. The Liberation also uses sliders and toggle switches instead of the Prodigy's knobs and slide switches. The Liberation is fairly simple to use and has that unique monophonic Moog sound. Its two analog oscillators are combined to produce a monophonic, single-note output. Each oscillator features sawtooth, triangle and square shapes (waveforms can be selected independently on each VCO) adjustable over three octave ranges each, and they can be mixed together to produce a variety of tones. There is also a simple polyphonic section that can be useful for playing organ-type sounds. There is the traditional 24 dB/oct Moog filter section with its own cutoff, resonance (emphasis) and envelope controls (attack, decay/release, sustain), and a Loudness amp with attack, decay/release, sustain envelope controls. Some other nice on-board features include a Ring Modulator, Noise Generator, and syncable VCO's. But one of its great features is its ribbon controller, located in the hand-grip portion of the synth which can be used for pitch bending and modulation effects."