The product is a lot of 2 ADDON DDR2 667MHz DIMM Memory RAM modules, with a total capacity of 2GB. The memory modules have a form factor of DIMM and a type of DDR2. Their bus speed is PC2-5300 (DDR2-667). The model number is MT16HTF25664AY-800J1. These memory modules are used for upgrading or replacing existing RAM in computers and laptops that require DDR2 memory technology. This product offers a reliable and affordable solution for expanding the memory capacity of a system for improved performance and efficiency.