The product is a set of 3 1GB 1Rx8 PC2-6400U-666-12-ZZ DDR2 SDRAM modules from Samsung. These DIMM modules have a bus speed of PC2-6400 (DDR2-800) and are designed to provide high performance and reliability for computing systems. With a total capacity of 3GB, this set of memory modules is ideal for upgrading or replacing existing memory modules in desktop computers for improved speed and efficiency.