High-performance MIDI controller with 16 MIDI terminals. - Brand: Roland - Model: A-880 - Connectors: MIDI IN/OUT - Power: AC100V 5W - Number of Terminals: 16x MIDI terminals - Functions: MIDI patcher/mixer - Buttons: 20 operation buttons - LED Indicators: MIDI signal display, etc. A convenient device that allows you to switch the IN/OUT connections of many MIDI devices with buttons. I have confirmed that it can switch between 8 MIDI IN and 8 MIDI OUT connections. I have not confirmed the mixer function. The backup battery has been replaced with a new one. It is working, but it is an old device, so there is some deterioration in appearance. No claims and no returns are accepted. Thank you for viewing.