A:AnswerYour Razer BlackShark V2 X uses a 3.5mm headphone jack, not USB. If your PC isn't recognizing it: Plug it in fully. Check your PC's sound settings to select the correct audio input/output. Or Try a different 3.5mm port on your PC. Or You could also buy a USB sound card adapter with a 3.5mm port if needed, but try the above steps first.
A:AnswerGiven that it is corded, you will need the adapter for your IPhone if you don't have the 3.5mm headset port. With that said, adapters can be as cheap and reliable as $5.00. That's what I did and had zero issue with it recognizing the equipment as headset with a microphone.