The product is a set of two 512MB Samsung PC2-5300U-555-12-ZZ DDR2 SDRAM modules, specifically designed for desktop computers. Each module has a capacity of 512MB, resulting in a total capacity of 1GB for both modules combined. The modules have a form factor of DIMM and operate at a bus speed of PC2-5300 (DDR2-667). Ideal for increasing the memory capacity of a computer, these Samsung modules are reliable and efficient in providing additional RAM for improved performance.