1. It is good that you can use the headset with both header and with earloop. Both is and one can modify the course of 30 seconds.
2. The fit is good, the headset is comfortable at least with the headband on the head. The earloop I do not use.
3. The connector has been changed apparently, because it fits with me easily on the handset to my Siemens Gigaset SX680isdn
4. You can adjust both the earpiece and the microphone volume
5. As one of the very few (!!!) this headset has a button to mute the microphone. This is a very valuable facility when business takes part in conference calls, for example. Then, if that is in the background the child cries or to type on the keyboard, it has traditionally been annoying if you so annoying all the conference participants. This is now over. This was also the main reason for me, just to buy this headset. Then I searched for months!
Otherwise, I know well from the PC headsets that Plantronics can always rely on!
