Only hiccup with these earbuds is that people say I sound muffled like I have them on speaker but Im far away from the receiver. Even so, as I said, these are great for me. They then went on offer so I ordered them. This was my first purchase of a Crocs product, so I didnt know what to expect. ******previous review******As you can see from the pics that the lugs on outside edge of both shoes have begun to come unglued. Not a huge gripe though, still sounds pretty good all things considered. The USB 2. When they get dirty we just scrub them with our hand, soap, and water and let them air dry. Once the device is registered, give it about an hour before it full goes on line. I can honestly say that the 2019 Razer Kraken is not only 20.