Thank you for your interest in the product. Please read the following and consider it. m(_ _)m [Product Description] Product Name: 《Used, Almost Unused?》 Otona no Kagaku (Adult Science) Vol. 7 Gakken Electronic Block EX-SYSTEM EX-150 Reproduction Edition [Product Condition] 《Used, Almost Unused?》 I believe it is almost unused. I put batteries in and made the simplest circuit. It worked without any problems. I haven't checked everything, so please understand that. [Other] Please refrain from purchasing if you are a nervous person who cannot understand that this is a used, long-term personal storage item. There are no warranty cards, cases, or other accessories. Please check the condition in the images.