Yes, it works with key mic weapons, and uses a 5/8 thread mount to mount to the base of the Razer Seiren X. Some weapons may require a 3/8 to 5/8 adapter to mount this microphone.
Of course, it works for PS4. Since I have a mic on my PS4 I have used it quite easily several times. Just plug in any USB port and you can go to PS4.
No, it is not possible. Because now (December 2018) Xbox does not support USB microphones.
Yes you can use it during gameplay or for talking in games … You can easily set up this mic in your game to communicate with your friends as long as a USB connection is allowed on the device you are using.
You probably can’t because I’m not 100% sure. Search YouTube You can find a video about this microphone and how it can be used on mobile.
Razor says X hs is a built-in pop filter and shock mount. That being said, I bought a cheap screen for only 12 12, and will probably be or will be mounting a shock here very soon. (My rod arm is directly connected to my desk and sometimes you can hear the desk hit/bump through it) which is done for extra measurement only.