The Kingston 2GB 1Rx8 PC3-10600S-9-10-B10 Laptop Memory RAM Kit includes two modules, each with a capacity of 2GB. These SO-DIMM modules are designed for DDR3 SDRAM memory technology and have a bus speed of PC3-10600 (DDR3-1333). The total capacity of the kit is 4GB, making it an ideal upgrade for laptops in need of additional memory for improved performance and multitasking capabilities. Kingston is a trusted brand known for producing reliable and high-quality memory products.