"The SwanCrystal is the third and final release in Bandai's WonderSwan handheld game console series, succeeding the WonderSwan and WonderSwan Color. It was released in Japan on July 12, 2002.

The SwanCrystal was a 16-bit handheld game console that like its predecessors, was powered by one AA battery. It allowed the input of personal data such as name, birth date, gender, and blood type by holding the Start button while turning the system on (this was possible in both the previous consoles as well). It was compatible with all previous games for both the WonderSwan Color and the original WonderSwan. It was available in four different colors: Skeleton Blue, Skeleton Black, Blue Violet and Red Wine."

Source: Wikipedia, "SwanCrystal", available under the CC-BY-SA License.