IYKYK. This is a piece of very vintage music equipment. It’s been sitting for years. Time to pass it on. I’ve checked out most functions and they work, but I can’t guarantee everything is 100%. Sliders for the chorus and volume are missing and are scratchy, but they work. Presets, pitch and modulation wheels work. I will be out of town the next three days, but you can check it out next Wednesday through Saturday. $400-$1000 or more on eBay but $100 here in Tucson! 😊 Cash only. Price firm. All sales final.