The 4GB SK Hynix DDR3L 1600MHz PC3L-12800S Laptop RAM consists of two 2GB memory modules, with a total capacity of 4GB. It is designed in a SO-DIMM form factor, featuring DDR3L technology and a bus speed of PC3-12800 (DDR3-1600). The memory modules also include ECC memory features, ensuring error correction for reliable performance. Ideal for enhancing the memory capacity and speed in laptops, this RAM is a dependable choice for improving system performance.