Not for proffesional work under stress

I use the headset in the office on a Gigaset DECT phone with Bluetooth, so quasi-stationary.
Positives: Of the acoustics and features the best headset that I had previously. Especially handy is the extra charging cradle that I boot the computer via USB and then the headset overnight recharges, although the computer is off.
The caller is very easy to understand and my tuner works the least "Hot" by all headsets tested so far.

BUT: The headset is not for the fleet. The voice message "Aannruuuf Anneeehhmennn" was not switched off from the beginning and after Sotwareupdate before coming and after that a polyphonic tone sequence - while already taken?!?. So you could "batschen on the wall" in the device hassle. Perhaps there are times a firmware update with disconnectable voice prompts?