The hands-free system works quite well. However, there is no external microphone and my Nüfi is not very far away when driving. (It's mounted in a Smart) I think with music in the car or strong outside noise, the Nüfi is rather quiet, but the speech is transmitted quite clearly through the microphone. The hands-free system in the Nüfi cannot be compared to a permanently installed one, but it works quite well as a "portable" solution.