The product is a set of four 16GB DDR3 SDRAM memory modules from Micron, designed for laptops. Each module has a capacity of 4GB, and they run at a bus speed of PC3-14900 (DDR3-1866). These SO-DIMM modules are ideal for upgrading or replacing memory modules in laptops that require reliable and efficient performance. The 16GB total capacity ensures that the system will have ample memory for tasks and applications that require a significant amount of memory.