The product is a combination of two Qimonda 4GB DDR2 PC2-6400S 800MHz memory modules and one SK hynix 8GB DDR3L 1600MHz memory module. The total capacity of memory is 12GB, with a bus speed of PC2-6400 (DDR2-800). The memory modules have a lifetime manufacturer warranty and are designed in the SO-DIMM form factor. This memory upgrade is suitable for computers and laptops that require additional memory capacity for improved performance.