The BT Drive Free 411 from Blaupunkt is a bluetooth hands-free speakerphone system for vehicles that enables drivers to use their cell phones in a safe and convenient manner. It is neatly attached to the steering wheel, and has a built-in microphone and speaker. Actually, it has a multi-function feature that enables the simultaneous use of two cell phones, but don’t try to multi-task using two cell phones while driving. Just remember that the BTDF411 has this feature, and it might be useful for conferencing or if there are more people in the car. The audio quality is stunningly good because it has in-built technology for echo cancellation and for suppressing noise. Just to be exact, the speakerphone comes with a talk time up to 15 hours and standby time up to 400 hours.