This product is a lot of 4 modules of 2GB each, totaling 8GB of Hynix DDR3 SDRAM laptop memory. Each module is in SO-DIMM form factor with 204 pins and a bus speed of PC3-8500S. Made in Korea, South, this memory is suitable for laptops and is sold as a single unit. Perfect for upgrading or replacing memory modules in laptops, this product offers reliable performance and quality from a trusted brand like Hynix.