A-Tech For Apple 2GB Kit 2 x 1GB PC2-4200 533MHz PowerBook G4 Late 2005 Mid 2006 M9969LL/A A1138 M9970LL/A A1139 Memory RAM 2GB Kit 2x 1GB (2 x 1GB) SO-DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For PowerBook G4 Models: M9969LL/A M9970LL/A A1138 A1139 PowerBook5,8 PowerBook5,9