Thank you for viewing. This is Signe by VERTUES. It was sold as a limited edition, a sibling model to the Stella from the same manufacturer. Operation has been confirmed. There are no scratchy knobs. It's still in good condition, but there are minor scratches and signs of use. Since it was used in live performances, Velcro for an effects board is attached. You can listen to the sound on YouTube, so please search for it. Shipping included. Please understand that this is a used item managed by an amateur, and purchase accordingly.