The only two crux of the matter:
1. How to read already in other reviews, the bearing surfaces are unfortunately always parallel. Which means you have to bow quite far put back to allow the headset to some extent completes and comfortably. It is better if the handset would easily twisted either each other, or have a degree of flexibility would be. But is also so because I had many much poorer headsets ...
2. If you still able is quite perceive high frequency sounds, is on the right side unfortunately always hear "classic" Bluetooth beeping. Only if you use the included jack cable, the unpleasant noise is from all over. Fortunately overlap most of the songs and audio signals from video and applications, these high frequencies. In accordance with high noise levels in the area (inner-city streets, public transport / train stations, bus / car ride, etc.) no longer falls on the beeping and there is such a headset usually mainly procures for it is not all too tragic. But it would be very interesting to see whether the noise actually occurs in all devices, or I have only a "defective" unit. I fear, however, that it is present in all copies, because I have already experienced the same thing in some other Bluetooth devices. Some manufacturers (eg TDK) make it even that absolutely no Bluetoothstörgeräusche exist.
Conclusion: If you 30+ is thus usually already can perceive no such high frequencies more, or to it not disturbing, then you have definitely my buy recommendation!
