- Model Name: TR-08 - Brand: Roland * This listing includes the main unit, box, and instruction manual (as shown in the photos). Batteries, USB cable, and power supply are not included. Thank you for viewing. I am selling this as I have no opportunity to use it. I have confirmed it can be powered by batteries and USB bus power. Operation has been confirmed, but as it is an electronic device, please purchase only if you understand that it is a used item and has been stored at home. I am sorry, but I am not considering lowering the price. Also, I am ignoring the price reduction function to prevent accidental changes. If you have any concerns or requests for additional photos, please ask in the comments section before purchasing.