Source: https://www.amazon.com/Sennheiser-GAME-ZERO-Special-Headset/dp/B0711SG5V6/ref=as_li_ss_tl?s=electronics&ie=UTF8&qid=1511305005&sr=1-3&keywords=Sennheiser+GAME+ZERO+Special+Edition+Gaming+Headset&linkCode=sl1&tag=polygonbf2017-20&linkId=c3b03e823a1880ad791fdadf051a79de