Up for sale is a high-quality Ramaxel 4GB DDR3 laptop memory module. This is a PC3-12800S (1600MHz) stick, providing a significant performance boost for legacy laptops. This specific module features the Lenovo FRU: 03X6561, making it an ideal 1:1 replacement for Lenovo hardware, though it is fully compatible with any laptop that accepts 204-pin DDR3 SODIMM memory.