Thank you for viewing. This is the iRig PSU 3A from IK MULTIMEDIA. It is officially stated to be usable with the iRig Pro I/O. https://hookup.co.jp/products/ik-multimedia/irig-pro-io It has been opened, but is completely unused. I was unable to use it and kept it in storage because it is not compatible with the audio interface I am using. Please check the appearance in the photos. The box has some damage. It will be sent via Nekopos. *Shipping costs will be covered by me. Please feel free to contact me if you have any concerns. No claims and no returns are accepted. I will not offer discounts based on requests (please understand that I will not reply to comments asking for a discount).