I use my Motorola 2-way Radios when I do Road Rallies in my Mini Cooper. Being able to leave the radio in the cup holder and have the microphone/speaker clipped to my seatbelt puts the sound where I need it and makes it safer and more convenient to communicate with others. Sound quality inbound and outbound is crystal clear and loud enough to hear over the engine, radio and open windows. Can not imagine using the radios without the additional microphone