4 SERIAL RS232 PORTS Features 4 x 9-pin RS232 serial ports, allowing easy connection of more serial devices to your computer. PCI EXPRESS X1 INTERFACE PCI Express x1 interface (also suitable for PCI-E x1, x4, x8, x16 slots) for excellent performance and long lifespan. STABLE & RELIABLE Equipped with a stable and reliable AX99100 control chip and a signal enhancement chip. Supports remote wake-up and power management. PCI EXPRESS COMPLIANT Single lane (X1) PCI Express endpoint controller with PHY integration, PCI Express 2.0 Gen 1 compatible, PCI Express Card Specification compatible, PCI Power Management 1.2 compatible, supports MSI interrupts, supports ASPM power management. VERSATILE APPLICATIONS Ideal for serial-connected devices, serial monitoring devices, data acquisition systems, POS terminals, industrial computers, and I/O expansion of serial I/O/USB embedded systems for add-on cards. Chipset: For AX99100 Port Number: 4 x RS232 serial ports Interface: PCI Express 1X Slot Applicable to: PCI E X1, X4, X8, X16 Slots System Requirements: For Windows XP, 2003 Server, Vista, WIN7, WIN8.x, WIN10, Linux Kernel 2.6.15 and later, Android 1.x/2.x/3.x/4.x/5.x Frame Length: Approx. 120 mm / 4.7 inches Operating Temperature Range: -40 to 85 ℃ Package Includes: 1 x PCIE Expansion Card