This item was used in my grandfather's homemade audio set. It appears to have been handled with care, but details and functionality are unknown. Thank you for your understanding. Other audio components (transformers of different sizes, vacuum tubes, etc.) are also listed, so please take a look at those as well. ※ Everything in the photos is included. Please confirm before purchasing. ※ Usually, items can be shipped the same day, but due to frequent business trips, please contact me if you need it urgently. ※ Functionality is unknown. No claims or returns accepted. #audio #TANGO #Tango #transformer