MIDI-compatible audio controller with 8 buttons. - Model Name: EFX MK II - Function: Audio Controller - Number of Buttons: 8 - Connections: MIDI compatible - Power: AC adapter - Condition: Shows signs of use - Back: Non-slip - Material: Metal Thank you for viewing. This is a switcher called Musicom LAB EFX MK II. The reason for being junk is that while power has been confirmed, only loops 1-4 can be used. Other MIDI functions and programs for loops 1-4 are usable. There are other signs of use, but I would like to sell this to someone who understands it is a junk item. How about it for those who only use up to 4 effects pedals and want a switcher??