The Crucial 16GB DDR4-2666 SODIMM CT16G4SFRA266 memory module is a brand new, unopened product designed for high-performance computing. With a total capacity of 16GB and a capacity per module of 16GB, this SO-DIMM module is ideal for upgrading or replacing memory in laptops and other portable devices. The DDR4 type and PC4-21300 (DDR4-2666) bus speed ensure reliable and efficient data processing, making it an essential component for enhancing the speed and responsiveness of your device.