Good surprise for this product because the sound produced not these headphones is nice. There is a good balance between the bass and treble at low volume and which remains when one increases. I use this headset with a MP3 (Samsung U5). The wiring is in good order and has no tendency to get along when it rubs clothing. The small clip provided which allows to hook the cable to clothing is a plus. The jack "L" seems also be a positive thing because it delays the inevitable false contacts that successive manipulations eventually cause ... The negative side of this is that a little plastic bar attached to each listener with the brand logo on it that is not necessarily very aesthetic and that would tend, I think, that the helmet takes less well in the pavilion of the ear. But this is a trouble may be related to my morphology ... This little inconvenience does not prevent to find it is a good quality product with a reasonable price (about 25) Especially when I compare these headphones with the purchase of another helmet at the same time (Klipsch Image S3) for which I was particularly disappointed ...