A-TECH 1GB STICK Toshiba Satellite A A135-S2346 A135-S2356 A135-S2376 A135-S2386 A135-S2396 A135-S2426 A135-S4407 A135-S4417 A135-S4427 SO-DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory Genuine Brand 1GB STICK 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 Toshiba Satellite A Series. (See Compatibility List Below)