My car didn't have an AUX jack or Bluetooth so I decided to pick up the Blue Ant CMT-USEN Bluetooth Car Kit to play music off my phone. Upon first listen of music through the small speaker I was more than satisfied with the sound clarity. The highs were crisp and didn't distort when I raised the volume. The bass was more subtle and not too pronounced, but it was present. I was also extremely impressed with this device's ability to auto connect to my phone when I returned back to my car and resume playing without hitting a single button. I did use this device to make and receive calls, but it was usually hit or miss when it came to voice commands. I would deliver a command in my normal register in a completely quiet car and it would have trouble understanding. I found myself repeating my desired orders several times until it finally executed my wishes. Once I got it to work the voice quality through the speaker was superb during calls, but for the person on the receiving end I sounded distant even though I was directly in front of the mic. I would definitely recommend the Blue Ant CMT-USEN Bluetooth Car Kit for streaming audio, but not for making and receiving phone calls.