A-TECH 2GB STICK For Toshiba Satellite P Series P105-S9339 P105-S9722 P105-SP6022 P105-SP921. SO-DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory. Genuine Brand. 2GB 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 P Series. (See Compatibility List Below)