The product is a set of two ELPIDA 4GB 2Rx8 PC3-12800S SO-DIMMs memory modules. Each module has a capacity of 512 MB, with a total capacity of 8GB for both modules combined. These DDR3L memory modules are non-ECC, non-registered, and non-buffered. Made by Elpida in Japan, these SO-DIMMs have a bus speed of PC3L-12800S (DDR3-1600) and a form factor of SO-DIMM. With a total of 204 pins, these memory modules are designed for high performance in computers and networking devices.