You can configure acceleration/deceleration, angle snapping and polling rate. The button controls have changed. Very clean sound, nice shimmer. These are wide & comfortable & look bland & boring, but professional. The strap around the heel is really comfortable and not too tight. I was super excited to receive these. I love the height of this luggage rack. Another thing is the instructions are in another language, but comes with pictures that are easy to understand. Happy with my purchase ! Great quality and buy.