Nintendo Mini Classics are a series of small LCD games licensed by Nintendo. The games were distributed by many different companies. Most games in the series are reissues of Game & Watch titles, but the series does include titles that were not from the original Game & Watch line. They are designed like a miniture Game Boy, ( excluding the Dual-screen titles ) and some games came in different colors. A key chain was also included. The unit is powered by two AG13/Button Cell/LR44 batteries, which are packaged with the Nintendo Mini Classic.