2 x RS422/485 Ports Bus Type: 32 Bit PCI Compliant Compliant with PCI revision 2.2 (3.3V & 5V) Speed: Up to 921 Kbit/sec 256 Kbyte FIFO buffer Plug & Play Automatic I/O & IRQ set-up ESD protection 15KV support Card Connector: 1 x DB25 Male to 2 x DB9 Male (via an adapter cable) Software Compatibility: Windows 2000/NT/XP/ Vista/ Windows 7/ Server 2003, 2008, Linux, SCO Unix Supplied with standard & low profile back plates 2 Year warranty