Accounting level, this headset is connected directly to my TELEPHONE but impossible to connect to Windows 7 (x64)!
Instead, it works perfectly with Windows 8 with Microsoft drivers, not the drivers supplied with the computer.
For the first time I use a Bluetooth audio device, I found the quality very good music and microphone captures.
The sound quality during calls is worse than what I expected, but not very serious if the interlocutor speaks clearly.
So basically this headset is what I wanted for a price quite correct.