Only released in Japan, the WonderSwan was Gunpei Yokoi's next system after designing the Virtual Young boy for Nintendo (he likewise produced the Video game Young boy system and the Metroid series). The initial WonderSwan features a monochrome display and was designed to be played either vertically or horizontally. Games varied on this aspect, with a variety of games. Plus it operates on simply one AA battery!
Black & White/Monochrome Display
Vertical or Horizontal Screen Play when Rotated
Games Feature Amazing Crisp Graphics
Skeleton White Pearl Case ~ Only Released in Japan