The Samsung 4GB DDR3 RAM 1333MHz PC3-10600S 2Rx8 Laptop Memory M471B5273DH0-CH9 is a high-quality memory module designed for laptops and notebooks. This SO-DIMM memory module has a total capacity of 4GB, with a non-ECC unbuffered design, and operates at a frequency of 1333MHz. The memory module is manufactured by Samsung, a trusted brand in the industry.