Waves Grendel Drone Commander

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via this auction

"Best analog drone synth out there, period. The magic is in its filter. Can be powered with a 9v battery (included) but it'll ship with a wall adapter as well. Only 800 of these were made. Fully operational. As I'm posting this one it's the only drone commander available for sale anywhere on the internet. No Reserve. Free Shipping. Good Luck Bidding.

'With a total of 9 knobs, the Drone Commander offers two manually-tuned oscillators and two LFOs, plus an unusually colorful and nasty filter. LFO1 is an analog variable-shape oscillator, and LFO2 is a pulse waveform that auto-synchronizes to LFO1 at a ratio of 2x, 4x, 8x, or 16x. Both LFOs can be routed to the filter for rhythmic patterns. A line-level output jack is provided for connection to amplifiers or effects.'"