The PCI-1604L is an 2-port RS-232 and compatible with the PCI 2.2 bus specification, The card provides 1 KV EFT protection , 8KV ESD protection and have many functions such as high transmission speed of 921.6 kbps; The card can work under a tough environment with -20 ~ 60°C operating temperature. PCI-1604L is an economical communication card for users who need to control several RS-232 devices.