This pedal recreates the rotary speaker sound of a vintage organ. It electronically reproduces the unique undulation and Doppler effect of a rotary speaker, and allows for fine adjustment of the simulation speed and balance. Recommended for those who want to add a warm, spinning feel to their guitar or keyboard. I was using this until recently, and I've performed a basic operational check. Knowledge is required for use and installation. No claims and no returns accepted. Please refer to the photos for the condition of the product. This is a used item, so please refrain from bidding if you are extremely sensitive or looking for a condition like new. We will ship within 2-4 days after the bid. Management number: 45