The product is a 4GB kit of DDR2 800MHz PC2-6400S 1.8V laptop memory, specifically two 2GB modules from the brand Hynix. It features a SO-DIMM form factor. The memory modules have a bus speed of PC2-6400 (DDR2-800) and are designed for laptops. Made in China, this RAM upgrade is a reliable choice for enhancing the performance of your computer system.