The instructions were clear. Do not the worry the mids and high are still there. Maybe an hour tops. These products from H&S have kept me from itching or flaking. I keep my USB 3. I would definitely recommend for outdoor use. Sie nahm die Kopfhörer mit entsetztem Gesicht sofort vom Kopf wieder runter. Habe die Schuhe seit ca. und dann DAS! The sound quality is simply amazing for a headset in this price range.