The Delock PCIe Express card adds an external RS-232 high-speed port to your system. Use this card for applications like data logging, machine control systems, automation, development or communication. Extensive surge protection and the wide temperature range means this card can be used in an industrial setting. System requirements: Windows XP/XP-64/Vista/Vista-64/7/7-64/8.1/8.1-64/10/10-64 PC with one free PCIe Express slot Power supply with a free Molex power connector