The product is a lot of two Hynix DDR2 SODIMM memory modules, each with a capacity of 2GB, totaling 4GB for the pair. The modules have a bus speed of PC2-6400 (DDR2-800) and a form factor of DIMM. The specific model is HYMP125U64CP8-S6, designed for desktop computers. This memory RAM stick set is suitable for upgrading the memory capacity of a compatible desktop system.