It makes a low, electrical oscillating noise. Perfect nude wedge for work or cocktail occasions. Fully loaded not a bump in a full turn. I am normally a 10 and I am keeping the 9 pair, so they do run large. They fit securely into the PS4 controller and my kids say they work very well. Very solid speaker that outshines the others Ive seen for this price. Lucen geniales puestos. It is a bit on the large side and quite heavy as well. ) Upside, the sole is very comfortable and would have been a wonderful shoe had the rest accommodated my foot. The steel for the main apparatus is warped and can easily be seen against a flush wall.