This B&H Kit includes two 4 GB 204-Pin SODIMM DDR3 PC3-10600 Memory Module from Crucial that help increase the speed of your notebook computers. The module kit is designed to provide additional random access memory for enhanced multi-tasking power. Increasing your computer's RAM enables more applications to run simultaneously without system glitches. This kit adds a total of 8GB DDR3 memory with each module comprising of 4GB. The SODIMM memory modules offer 1333 MHz clock speed to deliver superior performance.