The Cablexpert CC-DB9ML-01 is an internal COM port extension designed to add a DB9 serial port to your computer. It features a female DB9 receptacle mounted on a gold-colored low-profile metal bracket, allowing it to fit easily into the expansion slots of compact cases. This adapter uses a 40 cm flat ribbon cable that connects to the motherboard via a 2x5 pin IDC connector. It provides a practical solution for users who need to connect legacy serial devices to modern hardware without occupying a full-sized PCIe slot.