This listing is for a high-quality 2GB DDR2 SDRAM memory module manufactured by Crucial. The module is designed to work with desktop computers and has a form factor of DIMM. It has a bus speed of PC2-5300 (DDR2-667) and a total capacity of 2GB, which is provided by a single module of the same capacity. The memory module is model number CT25664AA667.K16F and is ideal for those looking to upgrade their computer's memory for improved performance.