Add an rs232 serial port to a notebook or desktop computer with this plug and play usb adapter cabler r this versatile device ships with a 9 pin connector and a 25 pin rs232 adapter for a variety of connection optionsr integrated 3ft cable allows you to connect directly to your serial devicesr plug and playhot swap support enables you to add and remove this adapter without having to reboot the computerr r the icusb232db25 usb to rs232 db9db25 serial adapter cable mm lets you connect 9 pin