THE SOUND
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The sound is quite satisfactory, even very satisfactory. I found the sound made different depending on whether the anti-noise system was enabled or not. I guess it makes sense. In some cases (type of music) I prefer to activate, in others not. But in any case, when there is external noise activate brings a definite plus.
NOISE REDUCTION
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When the noise reduction is activated white LED activates. You can switch to passive mode (without noise reduction) if the battery is empty. The battery lasts about 30 hours according to Philips, to me it was about 25 hours. But of course probably ca depend atmospheres and use of each.
TELEPHONY
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The cord offers a remote control that allows a single command (answer / end calls or play / pause) compatible with all smartphones.
DESIGN
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The design is elegant and rather quiet. Long gone, it can bend easily to store in the included case. Rather, it holds well on the head, although moving it is necessary to replace. But it remains lightweight.
Also note that you can charge the headset via a micro-USB. It enables onc to use an external battery that is also used for its smart phone.
Overall a very nice helmet, My rating would have been 4.5, because of the price a little high, but between 4 and 5, footnote 5 seems fairer to date.
