Pl2303hx USB to TTL to Uart Rs232 Com Cable Module Converter Easily add a RS-232 DB9 serial port to your PC when it requires RS-232 serial communication with other devices. Six modem control RTS, CTS, DTR, DSR, DCD, and RI signals. Supports remote wake-up from MODEM input signals. Plug and play with the creation of COM port which simulates the traditional COM port on most operating systems allowing the existing COM based applications migrate to USB serial. Built with Prolific PL2303HX Rev. D chipset which has been widely used and is fully compatible in most operating systems such as Windows, Mac, and Linux, etc. Supports RS-232 serial data transfer rate from 75bps to 12Mbps 256byte inbound and outbound buffers.