The Crucial 32GB DDR4-2666 PC4-21300 SO-DIMM Laptop Memory is a high-quality memory module designed specifically for laptops. With a form factor of SO-DIMM and a capacity per module of 32GB, this DDR4 SDRAM memory provides fast bus speed at PC4-21300 (DDR4-2666). The Crucial brand is known for its reliable and compatible memory products, making this module a great choice for upgrading or replacing existing memory modules in laptops for improved performance and efficiency.