Hello Sandra,
no! i'm using it directly with my lenovo-BT device - no plantronics dongle!
I didn't know, that i need a special dongle for it, since in general it works - i can use it as a headset - only "answering call per BT-button" + SDK does not work.
So there is no chance to make this work without BT300 ? Actually all i want is: answering a call by using the button in the headset. So i need to capture that "button-press" somehow.
I know with android it works. But i need this for windows.
Thank you very much.