The used Samsung M471B5773DH0-CH9 4 GB laptop memory ram is a set of two 2GB PC3-10600S DDR2 SODIMM modules, ideal for upgrading or replacing memory in laptops. Manufactured by Hynix in Korea, South, these modules offer ECC memory features and come with a lifetime manufacturer warranty. With a total capacity of 4GB and a form factor of SO-DIMM, this memory ram is a reliable and efficient solution for improving the performance of your laptop.