Following a huge research is a perfect helmet. Charge indicator, witnessed everything beep to tell the truth more equally. The sound quality is no more! p too low and no acute .For speech actually very good and then it all depends on what you connect on an amp is clean because you just change bass and treble. Another serves his head a little, but it passes. Go let's be serious for the price very well. (Ah small problem if you are active the charging socket is therefore fragile careful .. (connects everything easily.)