If your PC or other devices have separate audio and mic ports but your Cosmic Byte headphone has a single audio jack, you will not be able to use the microphone on the device.
SOLUTION
You will need to buy a 2 Male-1 Female Audio and Mic Splitter which will split the headphone audio and microphone audio into separate jacks.
Buy Link: https://www.thecosmicbyte.com/index.php?route=product/product&product_id=84