To me it renders the headset useless because i only want it for sat nav and hearing the directions, everytime the voice comes on, the bluetooth device reactivates itself from idle/sleep mode and does so with an irritating "BEEEEP" noise, which plays over the voice commands! I'm taking it back today, i'll try another bluetooth headset in the shop if i can, or do all bluetooth headsets beep when they become active from sleep/idle?