Setting up the Razer Seiren X is extremely easy. Simply assemble the mic as instructed with the guide, plug the provided cable into a USB slot, and then follow the below instructions for optimization:
If your PC hasn't automatically selected the Razer Seiren X as the default input device, then you will have manually do it. This can be done by typing in the taskbar on Windows 'Sound Settings'. Clicking the option that pops up will take you to the window that is seen in the above picture. From here, you want to navigate down to the 'Input' tab and then select Razer Seiren X as your designated input device.
Now click on 'Device Properties,' as seen in the first image. Clicking on this will open the tab seen above and is where you will be able to change the sensitivity of your microphone. Having a friend on a live chatting service such as Discord or TeamSpeak can really help here because you want to be asking your friend if your microphone is too sensitive so you can adjust it, respectively. If you can't get in contact with someone to help you out, don't worry, I have a fix for that too.
Looking at the second image, you want to click on 'Additional Device Properties,' this will open up a smaller window with multiple sub-tabs. Clicking on the 'Listen' sub-tab will take you to the above window, where you will be able to select 'Listen to this device.' Selecting the checkbox and choosing your output source for the sound (preferably headphones) will let you listen to what the microphone is picking up. This will allow you to adjust your volume level respective of your environment.