This is an expansion unit for Mackie's standard MCU, the MCU Pro, adding 8 faders. It was installed in a non-smoking studio and has hardly been used, so I think the condition is good. It is a used item, so please forgive any minor scratches or scuffs. Power-on and calibration tests have been performed. Manual, AC adapter, and box are all included. The MCU Pro is also for sale. For those who purchase the set, I will give a MIDI cable as a bonus. Thank you.