If you've got older computer equipment and no cable to connect it， we've got the solution. This adapter set converts RS232 9-pin and 25-pin serial ports (DB9 & DB25) for connection to a USB port. The USB end eliminates tricky serial connection setup.TECHNICAL SPECIFICATIONS:Includes one USB 2.0 to 9-pin Serial Male Adapter; & one 9-pin Serial Female to 25-pin Male AdapterFor use with computers without serial portsIncludes Driver CDCompatible with Windows 95/98/98se/2000/ME/XPCable Length: 3 feet