The product is a set of two Hynix 1GB DDR2 SD RAM modules, with a total capacity of 2GB. These modules have a form factor of DDR2 SD RAM and a bus speed of PC2-4200 (DDR2-533). They are unbuffered cl4 and non-ECC, making them suitable for various computer systems. The product comes in a unit quantity of 2 and has a total of 240 pins per module. It does not come with a manufacturer warranty.