This headset is a very good device kabelgebundes fulfills its purpose. I use it on the plug of the Siemens Gigaset DL 500A in my sales office. The modulation is good, in both directions, one can understand everything well, the volume of the loudest mode is still enjoyable. The fit on the head is in my case also good, pushes me or even hurts nothing. Note: I wear this headset but not non-stop all day. I use it as otherwise the handset of your phone. Direct Call reception on the headset is not possible. I have solved it, which I have put me through the menu guidance a "Headset button" in the speed-dial buttons and can take over calls. The possibility of "collapsing" is given when someone wants to transport the unit in your pocket. The padding of the earphone is soft. The microphone can be used both for left and right set also, so you are free to "ear choice". I can not fault it and am so far very satisfied.
