The product is a set of four SK Hynix DDR3-1600 ECC UDIMM memory modules, each with a total capacity of 4GB. These memory modules have a form factor of DIMM and a total capacity of 16GB. They are designed for use in computers and tablets, offering reliable performance and error correction capabilities with their ECC memory feature. With a bus speed of PC3-12800 (DDR3-1600) and 240 pins, these memory modules provide a high-quality and efficient memory solution for a variety of computing needs.