The product is a set of two 4GB DDR3 SDRAM laptop RAM modules from Crucial, specifically model CT51264BC1339.16FD. These SO-DIMM modules have a bus speed of PC3-10600 (DDR3-1333) and a total capacity of 8GB (4GB x2). With 204 pins, they are designed for high performance and compatibility with laptops needing DDR3 memory upgrades. Upgrade your laptop's memory capacity with this reliable and efficient RAM set from Crucial.