This is a 1.8M USB to Serial cable RS-232 with a DB-9 Male connector, If need to add USB serial port to your computer to support the same cables you use on your older computer this is the cable you need to buy. It has the same functionality as a "true" serial port. Works with any USB ports!FeaturesFTDI FT232RL and RS-232 level shifter chipsCable pin-out specification notation [Computer Side Signal Name (Output Pin #) ]: TXD (3), RXD (2), RTS (7), CTS (8), GND (5), DSR(6), DCD(1), DTR(4)USB 2.0 Full Speed compatible