I was on the verge of purchasing a new wireless set when I found these. There were no ?trademark? symbols on the shoes. These are great, especially if you happen to be a contortionist, or have a helpful friend or robot nearby. And an absolute bargain! I replaced mine for visual preference to match other desktop accessories like Yeti White microphone and White AudioEngine speakers. The bose sounded very average to me with a pure mid range focus without any good highs or lows. Birkis fallen sehr sehr groß aus. Im using them with a Google Pixel 3 XL. Nice and comfortable without the pain after wearing them for 5+ hours. But once it?s done? Good to go.