The Kingston 4GB 2Rx8 PC3-12800S DDR3 1600MHz Laptop RAM SODIMM is a high-quality memory module designed for laptops. With a total capacity of 4GB and a bus speed of PC3-12800 (DDR3-1600), this RAM provides reliable performance for your computer. It features a SO-DIMM form factor and operates at a voltage of 1.5V. Made in China, this DDR3 SDRAM module is ideal for upgrading or replacing existing memory modules in laptops, offering non-ECC and unbuffered memory features for efficient data processing.