Just my 2 cents:
I have the headset for about a week now and experience exactly the same issues as follows:
- crackling sound/static noise when using wireless mode
- no audio output when trying to use wired mode, mic works fine though
- no percentage value for battery makes it very difficult to estimate the remaining run time
- very short charging/connecting cable
- very, very basic software compared to other brands (e.g. Razer, Roccat)
To sum it up, I am very disappointed with the headset. The build quality is excellent but everything else (software, firmware, issues described above) is absolutely abysmal regarding the price asked.
As I am not willing to perform as a alpha/beta tester for Corsair, I will send it back to Amazon and write a review reflecting these issues I have and probably giving it 1-2 stars.
I am very disappointed, because my last Corsair headset (HS1) lasted for about 8 years and still has a better mircrophone and software than this one here. It really is a shame but I won't buy any Corsair products anymore in the future because of the experience with this headset and the slow reaction times of Corsair regarding all these issues with their supposed-to-be high end headset.