Maintain access to serial peripherals without adding a native COM port. The StarTech ICUSB232SM3 converts a USB 2.0 Type A connection to a 9-pin DB-9 RS-232 serial male connector, letting a Mac or PC communicate with legacy hardware through an available USB port. For teams supporting instrumentation, configuration tools, point-of-sale devices, and other serial endpoints, that means fewer workarounds and less time spent hunting for older systems with built-in serial I/O. At 3 ft, the cable keeps the connection short and controlled at the workstation, bench, or service cart. The black finish blends into professional environments, while the simple cable design avoids the bulk of a separate adapter box. StarTech backs the cable with a lifetime limited warranty, which matters when the adapter becomes part of a standard support kit and needs to perform consistently over time. This is the right choice when you need dependable USB-to-serial connectivity for DB9 RS-232 devices and want a direct, purpose-built cable rather than a generic converter. It preserves compatibility with legacy equipment while keeping the desktop clean and the deployment straightforward.