The Microvision is the first handheld game console that used interchangeable cartridges and in that sense is reprogrammable. It was released by the Milton Bradley Company in November 1979 for a retail price of $49.99, equivalent to $212.00 in 2023.
A Microvision with Block Buster cartridge inserted
The uncovered LCD screen of a Microvision, showing screen damage
The PCB of a Sea Duel game cartridge, showing the TI3496 processor from the TMS1100 family
A handheld game console, or simply handheld console, is a small, portable self-contained video game console with a built-in screen, game controls and speakers. Handheld game consoles are smaller than home video game consoles and contain the console, screen, speakers, and controls in one unit, allowing players to carry them and play them at any time or place.
A Nintendo DS Lite, the best-selling handheld console of all time and second overall
Game & Watch Ball
The original Game Boy
TurboExpress handheld