I purchased the motorola speaker phone accessory because I spend a lot of time traveling during the day and I am constantly receiving calls from the office. I had tried the earphone unit connected with wires and a bluetooth version (I don't like looking like Spock) but I found that the fact that I can move the motorola unit from car to car and eliminate the annoying ear connections is a big plus. The unit works well, sounds clear, and unlike some of the other reviews I read, the blue light blinking doesn't bother me at all, as a matter of fact, it reminds me it's on and alerts me to turn it of when I am leaving the vehicle. Hope this helps....