The problem is the fit. Although you can adjust the bracket in height; but the ears can not tilt to the head itself. Since the headset is generally quite broad, the ears are from above and below are only really at the ear on. If the photo you look closely, you can even recognize the problem. The mussels are holding firmly attached to the strap, so it could only be a straight line when the headset would be only minimally wider than the head. Unfortunately, the headset is much too wide for this design. Since you can not bend forward or backward and the micro, the headset fits overall very inaccurate.
In the first test also, the left and right channel was switched. What exactly was, I have not tried because I return the headset due to the poor wearability.
The quality offered for the price is right; but I decided draufzulegen prefer still 20 euros.