The use is very simple. Thanks to USB> micro USB cable, you can charge your headset easily from the right atrium: charging, LED red, blue LED charge. It is very easy to pair the headset and smartphone. I did it in seconds.
On the left ear, you have the sound adjustment button. I, who have a similar helmet I find it very convenient and I love to find this feature on my sport helmet. Because yes, this is a sport helmet. Indeed, it does not fall ears, it holds well, it is light, it is discreet and forgets. I have idea of the square cable because the cable does not roll and for me, does not take in my hair, it may be stupid this is very important.
The helmet talks. He can be heard. When you increase or decrease the sound he heard. When you no longer have battery a little voice in English, tells you so.
Small bonus, this headset makes handsfree kit. It's easy to take a call by pressing the off button. My correspondents have heard me very well.
In short, an excellent headset that will accompany you during your sports outings they are a cycling or walking.