Benesse Shinken Zemi Supplement Mini Tablet [Grade 4] I stored it without using it much. I think it's good for studying in your spare time. You can study kanji, calculations, and English content(^^) One AA battery is required. This is a used item, so I would like to ask those who understand this to purchase it. I try to ship within 24 hours. #Benesse #ShinkenZemi #Tablet #Grade4