Overall, it gives the car a nice look and provides functionality if I were to ever haul something on the roof. The main difference is that 2 KHz is a bit recessed relatively on the PRO model, and 6 KHz is a little more prominent. I was O DISAPPOINTED! He loves having sandals he can run and hike and bike in. At first I had serious trouble connecting and syncing both buds to my phone. It?s a very good but if you are looking for cheap jizbits. Worth buying ???????? Messed around with that and now I have a much better connection to it, to my iPhone. I only ordered these because the ones I usually get were out of stock, but I wont make that mistake again! They are wonderfully warm.