The product is a Japanese Nintendo 64 game called Mario Tennis 64, released in 2000 as an NTSC-J version. This sports game is part of the Mario Tennis series by Nintendo and is designed for the Nintendo 64 platform. The game is a single unit quantity, with the game name written in Japanese as マリオテニス64. This product is an import from Japan, making it a unique addition to any Nintendo 64 game collection, especially for fans of Mario Tennis.