I am interested in the Claver UC bone conduction headphones, but I have a number of questions. Does the multipoint bluetooth connection mean that the headphones can be paired with both my mobile phone and my PC at the time, and that I will be able to hear sound from whichever device is playing? Can phone calls be answered hands free, i.e. by a voice command rather than having to press a button? Where can I find details of the handset lifter? After a period of silence, how long do the headphones take to come out of standby? Is it possible to configure the headphones to not go into standby? If these headphones do not have these features, can you recommend headphones which do have these features?