The product is a 5-foot black serial extension cable with a DB9 male to DB9 female connector designed for RS232 communication. It is a pack of 7 cables, each with a cord length of 5 feet. Manufactured by PCCABLES.com, the model number is PCC-00821, and it is compatible with RS232 models. This cable is ideal for extending the reach of serial connections in various computer networking setups.