Around the face of the right earcup is a ring of rubber that functions as the volume control. This is easy to reach and adjusts nice and accurately. Volume can be altered whenever the headphones have power and are turned on, even if you’re just hooked up through the cable, but it doesn’t work if running without power. The sound signature is a bit bass-heavy, which may put off a few people, but thanks to impressive mid-range and high-end detail they’re far more balanced than many alternatives. products that are operated in combination with software, peripheral or ancillary equipment such as but not limited to batteries, chargers, adapters, headsets, connector cables, and power supplies ("Ancillary Equipment") not furnished or otherwise certified by Poly for use with the Poly products or any damage to the Poly products or Ancillary Equipment as a result of such use;

Although not class leading, their noise cancelling is impressive, too, and coupled with sound quality that surpasses most noise-cancelling rivals. The OpenMic feature likewise does a great job. Everything does sound a bit odd but it’s certainly good enough to make conversation and the volume levels seem well matched to the natural volume of external noise.The headphones' staggering 24-hour battery life delivers and is a killer feature for travelers who can’t be tethered to an outlet, and while the active noise cancellation isn’t the best in the industry, it's still very good at muffling the sound of the noisy, sleep-depriving outside world. We measured the noise level of the music we were listening to was around 46dB and the noise reduction system reduced it to just barely audible.

Activate the ANC and of course this ramps up to another level. It’s very effective at taking out lower frequency rumbles, which is great for reducing the general din of traffic. In fact it works well in conjunction with the passive noise isolation of simply wearing the headphones, which tends to filter out higher frequencies but have less effect on lower rumbles. The result is a fairly even drop in noise across the range, which is nice as it means what noise does leak through sounds natural. Poly further warrants on the same terms as this Limited Warranty the repaired or replaced Poly products for the greater of: (a) ninety (90) days following the repair and/or replacement, or (b) the remainder of the original Warranty Period for the Poly product that was repaired or replaced. The battery isn’t removable, though, which is always a shame. Not only does this mean you can’t replace it if it fails, but you also can’t buy spares for when you run out and aren’t near a charger. Still, this is common now and with a charge time of only three hours you shouldn’t ever be too long without your tunes. Perhaps more than them being out-and-out stylish is that they instantly come across as a quality product, thanks to top-notch build quality. There’s a real robustness to them and they’re finished very nicely indeed, with no hint of a misaligned joint or sharp edge. This does add up to them being a little on the heavy side, though. At 340g they’re 80g heavier than the Beats Studio Wireless.When a Poly product is replaced, the replacement product becomes your property, and the returned product becomes the property of Poly.