Wikipedia
The TurboExpress is a handheld video game console, released by NEC Home Electronics in 1990. It is essentially a portable version of the TurboGrafx-16/PC Engine home console that came two to three years earlier. It was sold as the PC Engine GT (Game Tank) in Japan.
It can play all the TurboGrafx-16's HuCard games. It has a 66 mm (2.6 in.) screen, the same size as the original Game Boy, and can display 64 sprites at once, 16 per scanline, in up to 481 colors from a palette of 512. It has 8 kilobytes of RAM. The Turbo runs its HuC6280 CPU at 1.79 or 7.16 MHz.
As part of the fourth generation of gaming, the TurboExpress primarily competed with Nintendo's Game Boy, Sega's Game Gear, and the Atari Lynx. However, with 1.5 million units sold, far behind its two main competitors, NEC failed to gain significant sales or market share in the handheld market.
Its launch price in the U.S. was $249.99. The price was briefly raised to $299.99, soon dropped back to $249.99, and by 1992 it was $199.99.