This is a JJ ECC803S vacuum tube. I am listing this on behalf of a family member, so responses to technical questions may be delayed. It is not new and unused. It doesn't seem to have been used extensively, but the duration and frequency of use are unknown. The box has some writing on it and is not in good condition. Please check the photos for the product condition. Shipping is planned via either Nekopos or Yu-packet Post. As this is a layman's inspection, there may be oversights such as unnoticed dirt. To prevent any problems, returns, refunds, or exchanges are not accepted. Please consider purchasing only if you understand that this is a used item.