YAMAHA CO-100 compressor effector. Sound quality can be adjusted with 4 control knobs. - Brand: YAMAHA - Model Name: CO-100 - Type: Compressor - Number of Control Knobs: 4 - Input/Output Terminals: IN/OUT [Condition] Scratches are visible overall. Operation has been confirmed. ※Please check the operation of the product upon arrival. ※If there is an initial operational defect within 7 days of product arrival, we will provide a refund, so please rest assured. ■□■□■□■□■□■□■□■□■□■□■□■□■□■□■□■□■□■□■□ Shipping Method: Yu-Packet Plus [About Stock] Since we share inventory across multiple sites, there may be discrepancies in the stock count at the time of your order, and the product you ordered may be sold out. [About Refund Guarantee] In the unlikely event of a problem such as a defective product, please contact us "before" leaving feedback. If you leave feedback first, we may not notice and our response may be delayed. We will respond promptly once you contact us. 250613A000