This is a supplement from Shinken Zemi Junior High School Course. I think it can be used to study English vocabulary and listening comprehension for around a first-year junior high school level. The Master Player has been tested and confirmed to be working. It uses a CR2032 lithium battery. Please prepare your own battery and earphones as they are not included. There are no writings or folds in the notebook, but the included orange pen could not be used. The cover of the notebook is deteriorated. How about using it for English study? This item has been stored at home.