Single-Lane (x1) PCI-Express with throughput up to 5.0 / 2.5Gbps Fully compliant with PCI-Express Base Specification Rev. 2.0 Top serial transmission performance up to 921.6 Kbps baud rate FIFO 256 Bytes, 15 KV ESD protections on board RS-232/422/485 mode selectable by DIP switch setting Each port supports 5V or 12V power output by DIP switch setting