The Samsung M471B5173DB0-YK0 4GB DDR3 RAM Memory is a single SO-DIMM memory module with a total capacity of 4GB and a bus speed of PC3-12800S. Made by Samsung, this DDR3 SDRAM memory is designed for laptops and offers 204 pins for compatibility. This memory module is a reliable and high-quality choice for upgrading or replacing existing RAM in computers. Made in China, this product ensures durability and performance for all your computing needs.