This is a supplement from Shinken Zemi Junior High School Course. It appears to be from the April 2011 issue for third-year junior high school students. Requires two AAA batteries, and I have confirmed that it works. Although it was hardly used at the time, please consider this item with the understanding that it has been stored by a private individual for many years. *There is a manual, but no box, no included earphones, and the batteries have been removed.*