1、4 RS232 Serial Ports: Features 4 x 9pin RS232 serial ports allowing easy connection of more serial devices to your computer. 2、PCI Express X1 Interface: PCI Express x1 interface (also suitable for PCI-E x1, x4, x8, x16 slots) for excellent performance and long life. 3、Characteristics: Has a stable and reliable chipset for AX99100 with a signal enhancement chip. Supports remote wake up and power management functions. 4、PCI Express: Single lane (X1) PCI Express endpoint control with PHY integration, PCI Express 2.0 Gen 1 compliant, PCI Express Card Specification compliant, PCI Power Management 1.2 compliant, supports MSI interrupts, supports ASPM power management. 5、Applications: Serial connected devices, serial monitoring devices, data acquisition systems, POS terminals and industrial PCs, I/0 expansion of serial I/0/USB embedded systems for add on cards.