I will complete by speaking about the noise canceling and voice-contacting general performance. As I claimed, Bose is not conversing up the noise canceling as much as it usually does. Perhaps that's as it's as good as it can be and speaks for alone. We have tested over 750 pairs https://allhealthmarket.com/product/smart-wearables/smart-electronics-smart-wearables/headphones/b19-wireless-headphones-with-fm-radio-bluetooth-headset-stereo-microphone/