4GB STICK For Samsung RV Series RV411 RV411-A02 RV411-S01 RV411-S02 RV413 RV415 RV415-S01HK RV420 RV420-A01HK RV510 RV510-A02 RV511 RV511-A01 RV511-A02 RV511-A03 RV511-A05 RV511-A07 RV511-S02 RV511-S03 RV511-S04 RV515 RV515-A01 RV515-A03US RV515-A04US RV515I RV515-S01HK RV520 RV520I RV520-W01 RV711 RV711-A01UK RV711-S01 RV720 RV720I RV720-S01. SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 4GB STICK SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Samsung RV Series. (See Compatibility List Below)