Yes it is wireless, it is expensive but very good.
I own the Polk 4Shot and Astro A50's. The A50's absolutely destroy the Polk's and rightly should being many times more expensive. What it comes down to is that the A50's are 7.1 surround headphones that will deliver great sound quality and directionality in games (like Halo!) which is great for awareness. The setup can be a pain, but it is worth it in the end.
The headphones are wireless for game audio, but do require a cable to the controller for chat.
Yes they are, I have tested a lot of headsets from Turtle beach, Tritton, Skull candy, Razer etc but nothing even comes close to my Astros
I have the Battlefield 4 limited edition A50s since 2013 and trust me they are worth it, I use them for my work and my gaming.
I love the A50, but I do have occasional issues with the mic. Folks can't hear me at all sometimes, and I can barely hear them without drowning out the game audio.
cheers guys, i'll go for it!