Thank you for viewing. This is a junk item: a SONY TA-E1000ESD digital processing control amplifier. ■ Operation Check Sound input from each input, line output, and headphone output have been confirmed. Basic dial buttons such as volume are working correctly. Other detailed functions have not been checked. Due to aging and the fact that not all operations have been confirmed, this item is listed as junk. ■ Included Items Main unit only - Brand: SONY - Model Name: TA-E1000ESD - Type: Digital Processing Control Amplifier - Condition: Stains on each terminal, scratches and dirt on the main unit Please confirm the above condition and the condition in the photos, and only purchase if you agree. Since this is a junk item, refunds are not possible even if there are operational problems.