UGREEN CR104 USB to DB9 RS-232 Male Adapter Cable (1.5m) is a specialized serial converter designed to connect USB-A equipped PCs and laptops to RS-232 serial devices such as modems, ISDN terminal adapters, CNC machines, barcode scanners, label printers, and network switches. Featuring an integrated PL2303 chipset, it supports baud rates up to 1Mbps for stable asynchronous data communication. Built with a 1.5-meter cable, double shielding, and gold-plated connectors, it offers reliable signal transmission across Windows, macOS, and Linux operating systems.