After my Beyerdynamic DT531, who has done me more than 12 years of good service, had to bury, should a new forth. Since the cable has always bothered me, it should be a wireless headphones at this time. When I saw the Sony MDR-RF4000K, I knew immediately that I have to try it, because it looks chic, has a super charger and was supposed to be free of noise. As usual so ordered from Amazon and I must say I was not disappointed. This Wireless Headphones sounds good, looks good, fits well (I ventilate a large head with big ears and there expresses nothing. Only now and then you have ears, but that is in closed systems always so), works in my 80 sqm Altbauwohnung (thick walls!) everywhere without interference and my W-LAN is not disturbed by the radio. I am completely satisfied and would buy this headset at any time.
