4GB KIT (2 x 2GB) For Acer Aspire M Series M1100 M1200 M1201 M1202 M1203 M1641 M1830 M3100 M3200 M3201 M3201-ED5400A M3202 M3202-B3800A M3203 M3610 M3621 M3640 M364x M3710 M3800 M3802 (DDR2) M5100 M5200 M5201 M5500 M5610 M5620 M5621 M5630 M5640 M5641-U5520A M5700 M5700-E5801A M5711 M5802 M7200 M7711. DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) 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 Acer Aspire M Series. (See Compatibility List Below)