To use headphones that come with a mic on your PC without needing a splitter, first, make sure to plug them into the PC's combination port. The plug should be pushed in all the way so no part remains visible. If your PC has separate ports for audio and mic, you might need a splitter.Remember to check if your headset has a mute function and ensure it's off. Next, open your computer's Sound Settings. Choose Realtek audio for both output and input. Finally, adjust the mic volume to hear clearly.