4GB 2X 2GB DDR2-533MHz PC2-4200 SODIMM Memory RAM for Laptop Computers (MAJOR BRANDS) Could be Samsung, Kingston, Hynix, Smart, Corsair, Elpida, Micron, or Nanya Warranty: LIFETIME WARRANTY Will Ship WorldWide from United States 2 of the 2gb ddr2 4200 Sodimm