The TurboExpress is a handheld video game console, released by NEC in 1990. It is essentially a portable version of the TurboGrafx-16 and can play all the TurboGrafx-16's HuCard games. It has a screen the same size as the Game Boy's however was back lit and in color. It was released on August 1st 1990 for $249.99, which would equate to $475.94 today.
It's difficult to determine when the system was released in the US, the only reliable information states that is was in 1990. The specific date provided is an guestimate.
August 1st, 1990 Source: wikipedia.org
Unable to determine hard release date, simply in 1990. Date guesstimated.