Boss's multi-effects processor, the GX-10. I purchased this three days ago at a musical instrument store for band performances, but I no longer have a use for it, so I'm putting it up for sale. It has been opened, but it's unused. The reason it was opened is because I asked the store clerk to inspect it when I bought it. To maintain the unused condition, I haven't tested the operation myself, but I confirmed that there were no problems during the inspection three days ago. I will basically ship it as is, but if you would like me to check the operation before packing, please let me know in a message when you purchase it. All accessories are included, including the outer box. Please refrain from price negotiations.