Add an extra serial port to the back of your PC from your motherboard. Easy to use & install Connects to your motherboard & adds an additional serial port to the back of your PC Backed by Star Tech.com's lifetime warranty This 9-pin Serial to 10-pin Header Slot Plate adapter features one DB9 male connector & one IDC10 connector. The adapter is constructed of high quality components & expertly designed to ensure durability & reliability. Please refer to the Technical Specifications to ensure your motherboard is compatible with this product. WhatÂ’s in the box 16in (40cm) 9 Pin Serial Male to 10 Pin Motherboard Header Slot Plate