Whether you connect a bluetooth receiver to headset, or connect a USB cable headset [audio & mic], the people I meet with routinely hear static. This happens on every laptop, with both of my headsets, every single time. I've torubleshooted every combination, and kno my headets are 100% fine if I connect it to the laptop directly.
The manufacturer this device will not charge anything (which is what I expected), but it does charge my cellphone and android tablet. Not really sure if I got the wrong one, but it is frustrating that it does not work as I expected it (dedicated to transmit data - and completely fails with audio).