(In the past we had problems getting other external speakers and soundbars to work and could only get them to work via the 3. I have no issues with the quality, durability, or functionality of the the product, which are all good. I usually wear either 8. I love me some Swedish Hasbeens, and these are very cute, however. They seem to be sturdy, though only time will tell. very light weight and comfortable, easy connection, great sound quality, very happy buy. I paired it with some nude heels & some pearls. Its more comfortable on the ear. I have been wearing Birkenstock for years. Zero instructions or even a diagram.