I bought this, because I have a headset in my ear all day long at work and don't really want to get in the car and use another one. Plus the last one I did have fell out randomly and slid under my seat. So I had to yell (while doing almost 70 down the freeway) that I would call the person back...not very practical. This device sits up on the visor and is ready for you when you need it. It is a speaker phone so you have to speak up a little and talk clearly, but it works great. Even better is the price for it! If you live in an area where it is really dark outside the light might bother you at night, but living in Los Angeles, I can't even notice it most of the time.