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This PCIe x1 expansion card is built with WCH382L chip, integrating dual RS232 serial ports and one parallel port. It effectively expands your computer with classic communication interfaces to connect various traditional peripherals. Featuring stable signal transmission and durable structure, it is perfectly suited for POS terminals, ATMs and industrial automation systems. It supports mainstream Windows and Linux systems, delivering plug-and-play convenience and dependable performance for industrial and commercial use.