Plugable USB to RS-232 DB9 Serial Adapter (Prolific PL2303HX Rev D Chipset) Allows any PC to connect serial devices and programs that communicate through COM ports 24-inch cable with standard USB Type A Male to standard 9-pin DB9 RS-232 serial connector PL-2303 Chipset for widest possible compatibility with Windows (10/8.1/8/7/Vista/XP), Mac, Linux, and other platforms Programmable baud rate from 75 bits per second to 128,000 bits per second. Plug and play creation of a COM port. Powered by USB - no external power needed We love our Plugable products and hope you will too. All of our products are backed with a 1-year limited parts and labor warranty and Seattle-based email support.