This product is a 16GB DDR3 RAM kit consisting of four 4GB modules, designed for desktop computers. The memory modules are from a Major Brand, with a DDR3 SDRAM type and a total capacity of 16GB. They have a PC3-12800U bus speed and a 240-pin form factor, making them compatible with a wide range of systems. Made in China, these memory modules offer reliable performance and are ideal for upgrading your computer's RAM capacity.