StarTech.com - StarTech USB to Null Modem Serial Adapter Cable, 6.6ft 1P6FFCN-USB-SERIAL

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 USB-2323TTLMOS-IS is a flexible USB to RS-232 TTL/CMOS adapter that eliminates voltage guesswork by offering selectable logic levels - 1.8V, 2.5V, 3.3V, or 5V - via an easy-access DIP switch. Designed with electrical safety in mind, it features 2,500Vrms isolation across TXD, RXD, and GND lines, making it ideal for sensitive embedded systems and lab environments. Features a 5-pin terminal block connector and supports data rates up to 921.6Kbps. Powered via USB, this adapter requires no external power and works seamlessly with Windows 7 through 11, macOS, and Linux.

C2G 26886 USB to DB9 Serial RS232 Adapter Cable, Blue (1.5 Feet, 0.45 Meters)