A-Tech 4GB KIT 2x 2GB HP-Compaq Presario Notebook CQ56-219WM CQ57 CQ57-105TU CQ60-100EA CQ60-100ED CQ60-100EE CQ60-100EG CQ60-100EL CQ60-100EM SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory 4GB KIT (2 x 2GB) SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq Presario Notebook Series. (See Compatibility List Below)