Costom Audio Electronics CAE RS616 MIDI & Audio Controller switcher. Operation confirmed. Includes genuine adapter and instruction manual (printout). This switcher & MIDI controller was designed by Bob Bradshaw and cost nearly 200,000 yen at the time of its release. Many people still say that the sound quality is the highest peak even now, and many professional guitarists still use it. MIDI control is also perfect. The operation has been checked by a professional repair shop before listing. The instruction manual is a printout. I think the instruction manual is important to maximize the functions. There are some scratches and dirt due to aging, but I don't think there is any problem with the use. Velcro is attached to the back. Please check the photos for details. Since this is a used item, please refrain from purchasing if you are nervous. Please read the profile to prevent trouble. Thank you very much.