Retro Digital Music Corp. MX-8 Midi Patchbay / Processor. Recently service and internal battery has been replaced and has been reset back to factory settings. This version is the more desirable model with a build in power supply, some versions used an external “wall wart” power supply. Perfect connecting multiple synthesizers, effects processor, midi sequencers, etc. High quality build, metal chassis, LCD screen is bright, all buttons are functional. 19” rack-mountable or can be set on desk on rubber feet. Serious inquiries please.