USB C to RS232 adapter cable connects from the USB-C port of a computer to a device with a female DB9 port; USB bus-powered cable connects to devices for configuration or programming MALE TO MALE serial to USB cable provides a convenient solution for communicating with equipment that require a DB9 connector; Use a DB9 mini gender changer (sold separately) if the fixed hex screws will not mate with the equipment port SIMPLE INSTALLATION of USB C to serial adapter using the drivers available for download from Cable Matters; Connect a null modem adapter (sold separately) to directly connect two computers with serial cables