Please, Sketchers, NEVER discontinue these shoes. 1 virtual surround sound. This Blue Tooth unit has excellent sound quality and fits very comfortably on my (large) head. For the price, I expected to be wowed. Not sure why it is designed this way. These didn’t cramp up my feet at all as I walked over 7 hours daily over the course of 5 days. That said, however, it appears fairly sturdy. Pretty good for price. Bluetooth connectivity is good 80"AT4033 = .