The product is 2 sticks of 4GB DDR4 2666MHz RAM from Samsung, with a form factor of SO-DIMM. It is designed for use in computers and laptops, offering a total capacity of 4GB per module. The memory features ECC error correction, ensuring data integrity and reliability. With a bus speed of PC4-21300 (DDR4-2666), this RAM module provides fast and efficient performance for various computing tasks. Additionally, it comes with a lifetime manufacturer warranty, making it a reliable choice for long-term use in your system.