The product is a lot of 2 Elpida 4GB 2Rx8 PC3-12800S SO-DIMMs, specifically the model EBJ41UF8BDW0-GB-F. These DDR3 SDRAM memory modules have a total capacity of 4GB, with each module providing 4GB of memory. They have a bus speed of PC3-12800 (DDR3-1600) and a form factor of SO-DIMM, making them suitable for use in computers and laptops that require this type of memory module. With 204 pins, these memory modules offer reliable performance for enhancing the speed and efficiency of computer systems.