This is the EX series of electronic circuit experiment kits released by Gakken in 1976. ※ Vintage item ※ Not a reproduction! By arranging the blocks with embedded electronic components according to the circuit diagram, you can assemble radios, wireless microphones, etc. The EX-15 is the earliest version of the series. It has been stored at home for a long time. Operation has not been confirmed. All parts and included booklets are shown in the images. (Batteries are not included) Please consider this item with the understanding that it is a used product. There are some scratches on the outer box and folds in the instruction manual. Please refrain from purchasing if you are sensitive to such issues, as this is an old item. Thank you for viewing.