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In September 2005, around the time of the Game Boy Micro's release, Nintendo released an improved version of the Game Boy Advance SP in North America, featuring a brighter backlit screen instead of the previous version's frontlit screen. The new model can be distinguished by the following features:
The box states "Now with a BRIGHTER backlit screen!" to distinguish the new model from the older, frontlit models.
The backlit SP has the Model Number AGS-101 on the label on the bottom of the unit, whereas the original frontlit SP has the Model Number AGS-001[10]
The switch at the top center of the console's lower face is now referred to in the manual as the "Brightness Switch" and selects between two levels of brightness, "Normal"(Low) and "Bright"(High) with no off setting. On the frontlit models this switch turned the frontlight on or off only. With the backlight set to "Normal"(Low) the brightness still surpasses the original AGS-001 with the frontlight on.
The North American backlit version comes in three standard colors: "Pearl Blue", "Pearl Pink" and "Graphite" (a grayer version of Onyx Black). There were also two Toys "R" Us exclusive backlit models; a "SpongeBob SquarePants" model[11] and a "Limited Edition Pikachu" model.