Online only, also available with Forza Horizon 2. Seems like good value when you consider BigW sells the headset for $219 on it's own.
Headset gets lukewarm reviews, from what I can tell it's not really wireless (plugs in to wireless controller).
Forza Horizon 2 http://www.bigw.com.au/product/polk-4-shot-wireless-gaming-h…
thanks all the same but this is a dupe https://www.ozbargain.com.au/node/200363