This is a sequencer called YAMAHA QY10. I purchased it from a used musical instrument store about six months ago, but I'm selling it because I haven't had a chance to use it. I bought it as a fully functional item, but please understand that I haven't been able to confirm its operation myself. I have confirmed that it powers on. If you don't need the case (which appears to be repurposed from a VHS video case), the shipping cost will be cheaper, so I will discount it by 500 yen. If you would like this, please let me know in the comments before purchasing. Thank you very much.