Quartet Serial PCI+DOS 4-port serial (16550) Universal PCI card -- Supports 32-/64-bit, 3.3V/5V PCI and PCI-X slots, Four high-speed 16550 UART serial ports (9-pin) support data rate up to 230 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.