The connection to my Samsung Tocco is very difficult and sometimes impossible. We had to press simultaneously on the helmet and on the search for Bluetooth devices to connect. Not intuitive.
With my PC running Windows 8, very difficult to send music files. The problem was probably Windows, but good. Once I managed to send a song but there has been a shift of maybe 25 seconds between when I send the file and the reception at the Bluetooth headset.
I do not recommend.