The product is a single 4GB G.Skill DDR3 PC3-12800 CL9 SQ Series laptop memory module. It features a SO-DIMM form factor and runs at a bus speed of PC3 12800. This module is designed to increase the total capacity of the system's memory, providing a boost in performance and multitasking capabilities for laptops. Upgrade your laptop with this high-quality and reliable memory module for improved efficiency and productivity.