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SIIG's long-term business vision, comprehensive product line, effective marketing strategy and exceptional customer support have made SIIG the leading brand for computer add-on products. High-quality control standards are evident by one of the lowest defective return rates in the industry. PRODUCT FEATURES: 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.