Robot Introduction Kit Light Sensor Falling Robot MR-004 Soldering Work Kit EK Japan Co., Ltd. This item has been stored unused since purchase. It was opened for photography, but the parts are still unopened, wrapped in plastic. Due to long-term storage (about 10+ years?), the outer box has scratches and dirt. Production has already ended, so it is believed to be no longer sold. Please understand that this is a long-term personal storage item before purchasing.