The product is a lot of 4GB Crucial DDR3 Laptop RAM modules, specifically PC3-12800 1600MHz SODIMM memory. With a total capacity of 16GB spread across four modules, each with a capacity of 4GB, this RAM is ideal for upgrading your laptop's memory capacity. These DDR3 SDRAM modules feature a SO-DIMM form factor and a bus speed of PC3-12800 (DDR3-1600), ensuring reliable performance and compatibility with a wide range of laptops. Upgrade your system's memory with this high-quality Crucial RAM for improved speed and multitasking capabilities.