Combined, internal Airport Extreme and BlueTooth board for the dual layer superdrive versions of the 1.67GHz 15" & 17" Aluminium PowerBook G4. It is also used in the ambient light sensor & iSight versions of the 17" & 20" iMac G5 and the 1.33GHz, 1.42GHz & 1.5GHz versions of the G4 Mac Mini.