https://www.corsair.com/uk/en/void
Bought them for BF1 and then stopped playing it. Tried it with BFV and I had a conflict with BFV and these.
n.b. just bought some replacements and it's resolved the issue - however I am reliably informed it was probably me, not the headphones

Keeping the steel series as I prefer them.
£50 inc postage to EBS member. They are £85 new.