Product Detail Guaranteed compatibility with any PC running Windows®, DOS® or Linux® Data transfer rates of up to 920 Kbits/sec for peak serial device performance Easy to install and use with full step-by-step instruction Supports the RS-232 serial interface 16 byte FIFO buffer ensures fast data transfer while multitasking . The "2port Pci 16c550 Serial I/ocard" is best product for you. We recommended 2port Pci 16c550 Serial I/ocard