This is the Valve X SE vacuum tube headphone amplifier made by Tokyo Sound. The exterior is relatively clean, and I liked the design very much, so I kept it carefully for a while, but I am selling it because I haven't had much opportunity to use it. It uses two 12AU7 vacuum tubes. Power and sound output have been confirmed. Please refrain from purchasing if you are concerned about the condition as it is a used item. Thank you for looking.