Sunix product page: DPKS04H00 SUNIX DevicePortR is the ideal choice to enable your current Legacy I/O devices networking. DPKS04H00 allows users to expand four RS-232 ports over Ethernet connection, and it works as a PCIe add-on card operation on any windows based tiny desktop, laptop, or All-in-one system. With SUNIX DPL2000Q High-Performance Ethernet-UART controller and exclusive I/O redirection technology, DevicePortR creates physical COM ports that support real time data communication and Ethernet-COM port hot-plug capability; user can expand RS-232 COM port easily without complex software configuration that improves deployment efficiency to achieve greater reliability in commercial and industrial automation applications. * Expands 4 independent RS-232 serial ports over Ethernet networking. * Works as a PCIe add-on card operating experience with Ethernet Hot-Plug capability. * DevicePortR Dock mode supports secured connection between PC host and DevicePortR. * Built-in SUNIX DevicePortR DPL2000Q High-Performance Ethernet-UART/Printer controller. * SUNIX DevicePortR proprietary Ethernet I/O Redirection Technology. - Port auto-mapping with real time data transmit and receive communication. - Physical COM port accessed via device manager. - Up to 256 COM ports working on windows system simultaneously. * Accesses tradition COM port by using existing software and AP. * Low power consumption design for Green Environment. * Certified by CE, FCC, VCCI, C-Tick, BSMI, RoHS, and Microsoft WHQL approval.