You are purchasing the M471B5273CM0-CH9 4GB Samsung DDR3 SODIMM laptop memory module shown in these photos. This RAM has a total capacity of 4GB, with each module providing 4GB of memory. It has 204 pins and operates at a bus speed of PC3-10600S. The memory features PC3-10600S technology, designed to enhance performance and efficiency in laptops requiring this specific memory type. Ideal for upgrading or replacing existing memory modules in compatible laptops.