Product Detail Compliant with PCMCIA Card Type II standard Single RS232 connector Compatible to industrial standard 16C950 UART Transfer rate: up to 921.6 Kb/s Automated hardware / software flow control available . The "Syba SD-PCB-1S PCMCIA 1x RS232 Serial Port Card" is best product for you. We recommended Syba SD-PCB-1S PCMCIA 1x RS232 Serial Port Card