The product is a set of two 2GB SO-DIMM 1066 MHz DDR3 memory modules from Hynix. Each module has a total capacity of 2GB, providing a total memory capacity of 4GB for the set. These memory modules are designed for use in computers and laptops, with a bus speed of PC3-8500S. They come with a lifetime manufacturer warranty, ensuring reliability and performance over time. With 204 pins, these DDR3 SDRAM modules are a reliable choice for upgrading or replacing existing memory modules in your device.