This is an item for sale, the main unit only. I believe it was an accessory for an old WALKMAN or something similar, but the details and model number are unknown. Please note that I do not have an environment to test its functionality, and its condition prior to this is unknown. I apologize. (If it is defective, I will accept returns and cancellations.) Also, please be aware that there are scratches, stains, and paint peeling due to use and aging.