Question about SteelSeries Arctis 7 Wireless

didn't know it had that!? But I can only say: The battery is so stupidly bad that the thing constantly drives me up the wall.

The headset does not have ANC. Generally, gaming headsets don't have ANC because they are only used at home, where there is (actually) no noise. But I think the headset still seals very well from the outside, if that's what you mean.