Thank you for looking. This is a sound book that I purchased in America about 30 years ago. It has been tested and is in working order. I believe it is a rare, retro, and vintage item that is no longer seen these days. Immediate purchase is very welcome!!!!! Please refrain from purchasing if you are sensitive about storage as it has been stored by an amateur. Please refrain from negotiating the price. We ask that you do not return the item. We ask that you be able to conduct the transaction smoothly after purchase. We ask that you remember to confirm receipt after receiving the item. Also, we will use recycled materials for packaging. We appreciate your understanding.