1.Four serial (16950) ports, Universal PCI card design with built-in 128-byte FIFO buffers to work in 32-/64-bit, 3.3V/5V PCI and PCI-X slots. RoHS compliant.2.Key Features and Benefits - Supports 32-/64-bit, 3.3V/5V PCI and PCI-X slots.Four high-speed 16950 UART serial ports (9-pin) support data rate up to 920 Kbps.Will work as standard RS232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.). Configurable via jumpers with silk-screened settings on PCB.RoHS compliant