USB End (Computer Side): The USB connector plugs into your computer (usually a USB-A or USB-C depending on the device).

9-pin Female End (Device Side): The 9-pin DB9 female connector connects to a device that has a 9-pin male serial port.

Driver Installation: The USB-to-serial adapter typically requires the installation of drivers on the computer to function properly. These drivers make the USB connection appear as a virtual COM port on the computer, allowing it to communicate with serial devices.

• On Windows, the system will usually install a driver automatically, or you may need to download it from the manufacturer’s website.
• On Mac OS and Linux, drivers may be automatically recognized or available for download.

Terminal Software: To communicate with the connected device (like a router or modem), you'll typically use terminal software (e.g., PuTTY, Tera Term, HyperTerminal) to access the serial console or send/receive data.