I have main unit.
type handheld game console
Gakken Gun Fighters — Japanese LCD Handheld
The Gakken Gun Fighters was a handheld LCD game from Gakken — the Japanese educational publisher and electronics company that produced a range of handheld games and electronic toys throughout the 1980s. Gakken was best known in the gaming world for producing tabletop LCD games with large displays and elaborate plastic surrounds that gave them a more immersive feel than pocket-sized handhelds. The Gun Fighters title reflected the popularity of western and shooting game themes in early 1980s handheld gaming, competing with similar products from Nintendo, Casio, and Bandai in the Japanese and export markets.