I have the main unit.
type game console
country Japan
os Nintendo
power 4 * AA batteries
ports extension port
Nintendo Mah-jong Yakuman — Japanese Tile Game Electronic
Nintendo Mah-jong Yakuman was a dedicated electronic Mah-jong game produced by Nintendo for the Japanese market — one of Nintendo’s many dedicated electronic game products produced before and alongside the Game & Watch series. Mah-jong, the ancient Chinese tile game, was enormously popular in Japan, and dedicated electronic Mah-jong devices were a significant consumer electronics category throughout the late 1970s and 1980s. Nintendo’s Yakuman brought the complex tile-matching and strategy game to a dedicated handheld format, demonstrating Nintendo’s broad approach to electronic gaming beyond its better-known arcade and home console products.