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This PCIE combo expansion card integrates an RS232 serial port and an IEEE 1284 LPT parallel printer port, powered by the highstability WCH382 controller chip. It enables modern desktop PCs to connect legacy serial and parallel peripherals such as old printers, industrial sensors, POS terminals and monitoring devices. Equipped with a lowprofile bracket and fully compatible with Windows 10, it is a practical solution for office, industrial and commercial hardware upgrades.