Suitable for permanent call

I was looking for a headset to the fixed line phone for long conference calls have a way, hands free and to have a decent voice quality - to recharge without another battery. It should use the headset with my AVM Fritz! Fon MT-F run. Have tried different wired headsets, including two from Sennheiser (PC151 and PC21-II PC VoIP). The Sennheiser had a great sound (microphone and speaker), but they were too heavy for me personally, too cumbersome, and the stereo headset was to carry on life unpleasant on the ears. The Jabra Wave is light as a feather, barely noticeable, the sound quality is more than adequate to make phone calls and can be worn for hours, one forgets that one uses it. Unlike some descriptions have nothing to be loaded, there is no USB cable and no battery. I'm very satisfied!