Multi-function guitar effects processor equipped with COSM technology. Overall, there are scratches and rust, but sound output has been confirmed. The exterior condition is not good, but it sounds great! There is a part of the back cover where a screw is missing. The original adapter, Boss BRC-100, is also included. Please judge the condition from the images. Due to the poor exterior condition, no claims or returns are accepted. - Model Name: GT-3 - Brand: BOSS - Features: Equipped with COSM technology - Functions: Effects, preamp, master volume adjustment Thank you for viewing.