The Wodposit 4GB DDR4 2666MHz SO-DIMM Laptop Memory is a high-performance memory module designed for laptops. With a total capacity of 4GB and a bus speed of PC4-21300 (DDR4-2666), it provides fast and reliable memory for your computer. The module features ECC memory, ensuring error correction for improved performance and stability. Perfect for upgrading your laptop's memory capacity, this SO-DIMM module is a dependable choice for enhancing your computing experience.