Using a cell phone directly can not only potentially damage your health but using them while driving can be very dangerous indeed, especially if you're driving a big-rig and you have to search around for your phone when it rings, answer it and then drive with one hand. That's where Bluetooth headsets come in. You can comfortably wear them while driving and then easily answer any incoming calls, where ever your phone may be. They are not without their problems though. First, many are not comfortable or keep feeling out of or off your ears. Secondly, many of the ones I have tried are not loud enough making it very hard to hear people, especially if you are slightly hard of hearing or driving a noisy RV. Finally, in a noisy environment, it is hard for people to hear you. The Cobra solves all these problems. It's boom mic easily picks up your voice while the over-the-head style makes it very comfortable to wear. The cushion headset sits comfortably over your ear, even if you are wearing a hearing aid, and believe me, it's loud enough (I have mine on about half the volume level).