This is a vocal effects processor. However, the AC adapter was included as an accessory, but I have lost it, so this is an offer for the main unit only. It's a TC-HELICON VoiceTone H1. After purchase, I only used it a few times for practice at home, and I have not taken it to live performances or studios. It has hardly been used, and I think it's in pretty good condition. Operation has been confirmed. Harmony generation also works without any problems. This is an ideal effects processor for adding thickness to vocals, and for solo performances or unit formations. Updated 1/7 Price reduced. Updated 1/11 I found the AC adapter, so it will be shipped with it included.