StarTech.com - ICUSB232V2 USB to Serial Adapter - PL-2303, 1 Port DB9

This Insignia NS-PU99501 cable allows you to connect a device with an RS-232 (DB9) serial port to a USB hub or USB-equipped PC or Mac and supports data transfer rates of more than 115 Kbps for rapid performance.

The GM-FTDI-LED USB to RS-232 Serial Adapter is the quick and easy fix for computers that no longer include legacy serial ports. Whether you're connecting to printers, scanners, CNC machines, PLC controllers or industrial gear, this adapter ensures full RS-232 signal support and smooth operation. It’s powered directly from your USB port, so no extra power supply is needed, and it features color LED indicators that flash with activity to give you real-time feedback on your connection. With an integrated 5 foot cable and support for Windows 7 through 11, macOS, and Linux, it's plug & play ready for your setup.

The USA-FTDI-36 USB to RS232 36 Inch Serial Adapter is a simple, reliable way to add a COM port to your computer for GPS, modems, printers, scanners, digital cameras, and other RS232-based devices. Built with an FTDI FT232RQ chipset, it delivers stable performance and fast communication with a high-speed UART, 128-byte TX FIFO, and 384-byte RX buffer. The plug-and-play design requires no IRQ, DMA, or I/O resources, allowing hassle-free installation and eliminating conflicts when connecting multiple devices. Powered directly by USB, this adapter provides TX/RX and GND signals without the need for external power. With Windows 11, macOS, and Linux compatibility, plus a convenient 36 inch cable length, it’s a versatile solution for expanding serial connectivity with ease.