It seems to be a software that turns the Game Boy into an electronic organizer. It's rare, so I bought it... Apparently, the calendar still works as of 2025. Please check the photos for the startup condition. The Game Boy Advance used for the operation check is not included. For those who are into niche items or electronic organizers. To prevent any swapping, please understand that all sales are final and no returns are accepted. The following text was written automatically by AI. "Nano Note," a Game Boy software released in 1992 by KONAMI. - Brand: KONAMI - Game Name: Nano Note - Model Number: DMG-NNJ - Country of Manufacture: Japan - Release Year: 1992 - Compatible Systems: Game Boy Thank you for viewing.