The Patriot Signature Line DDR3 Desktop Memory Upgrade Kit includes two 2GB DIMM modules, providing a total capacity of 4GB. These DDR3 SDRAM modules have a bus speed of PC3-10666 and are designed for desktop computers. Proudly manufactured in Taiwan, these memory modules are reliable and high-quality components to upgrade your system's performance and speed. Ideal for enhancing your computer's memory capacity, this kit is a practical and efficient upgrade solution for improving overall system efficiency.