This system was released by Bandai, the price range was $64.99 on December 2000, its predictors was released a year before WonderSwan Color. The WonderSwan Color was backward compatible with its predictors wonderswan. the wonderSwan color was not really successful because Nintendo had the main grip on the market because of game boy color. another reason why wonderswan color held up so long was because the company got an deal with squaresoft, who ported some original games. who are known for there Role-playing games. although the wonderswan color was never released in united states because Nintendo had a monopoly there. the wonderswan had a 2.8" LCD(liquid crystal display) and it use one AA battery, with about 20 hours of game play, weight 3.35 ounce. The wonderswan systems used cartridges with there system. about two years latter the releases the swan crystal which had the change of the LCD to thin-film transistor TFT LCD. the only way to find one is on ebay, there could be some new system but at a high price. around 50$ for a new system and 40 for used.

Links
Bandai WonderSwan - VidGame - Wiki wonderswan