Compliant with PCI Local Bus specifications, Revision 2.3, 32-bit bus Supports 2x UART serial ports Easy plug and play Built-in 16C450/550 compatible UART On chip 256 byte FIFOs in transmit and receive path of each serial port Serial data transfer rate up to 115,200bps Connectors 2x DB9 male serial connectors Operating temperature: 0 °C - 85 °C Operating humidity: 25% - 65% RH (non-condensing) Supports Windows 10, 8.1, 8, 7, Vista, XP and Linux 2x low profile