This Electro Harmonix Stereo Polyphase Shifter is in excellent condition.

Experience cascading sweeps and gorgeous, panoramic imaging through stereo outputs. Generate seductive stereo phase shifting at its finest. User-defined start and stop ranges allow you to sculpt phase shifting to fit your performance needs. Optical circuitry provides a wide dynamic range making the Polyphase ideal for hot output instruments, including keyboards. Generate stereo liquid phasing at its finest.