I took this headset specifically for cycling on noisy trails. And did not lose! At a speed of about 30 km / h on a noisy highway, with a headwind, I can hear the caller perfectly. Specially asked how they hear me. Also great! The noise of passing cars is present, but, as it were, in the background and is not a hindrance. The articulations of the voice are quite distinguishable from both sides. It should be noted that I have a smart iPhone 4, with which Plantronics guarantees 100%compatibility, therefore, the ringing signalscoming to the headset are exactly those that are set to subscribers on the phone. With Android devices, this may no longer work. Owners of Android devices are strongly advised to check the functionality of the headset functions upon purchase. As noted above in the shortcomings, the pronunciation of names and surnames from the phone's address book is understood by the headset very incorrectly. He does not even understand the simple 2022 word "Mama". In general, any spoken names and surnames can be interpreted in their own way, because of this, incidents can happen, sometimes very unpleasant: for example. likes to call 0911 very much. By the way, all these features can be disabled in the MyHeadset ater program, (). For example, I immediately turned off the Smart Sensor function, there are a lot ofcomplaints about its work based on reviews on forums on thenetwork. As a result, the headset has an unsurpassed voice quality, everything else is from the evil one. We will wait for bug fixes in subsequent firmware.