This is a red Nintendo Game Boy Original (model DMG-01), released in 1989 and later modified with a modern flash cartridge system. It features the classic dot-matrix monochrome display, D-pad, A/B action buttons, and a headphone jack. The modification allows it to load multiple Game Boy ROMs from a single cartridge, with the screen displaying a game selection menu. Powered by 4 AA batteries, it is a blend of retro design and modern functionality, making it a collectible for retro gaming enthusiasts and a practical device for playing classic Game Boy titles.