The product is a set of 4 DDR2 SDRAM RAM modules with a total capacity of 4 GB, with each module having a capacity of 1 GB. The modules have a form factor of DIMM and a number of pins of 240. The RAM is manufactured by Nanya, Hynix, HP, Qimonda, and Micron, with a model of HYMP125U64CP8-S6 AB and a bus speed of PC2-5300U (DDR2-667). This RAM set is ideal for upgrading or replacing memory modules in computers that require DDR2 SDRAM memory technology.