No directions sent with this item. They showed up and I tested them on my phone. The smaller ones were better. So far I havent had that problem with these. It is one of the best out there, from the design and comfort to the quality of the audio and its overall value. Wer unrealistische Erwartungen hat wird sicher nicht ganz so begeistert von den Kopfhörern sein, wer aber das Preis/Leistungsverhältnis realistisch betrachtet, der wird von diesen Kopfhörern sicher nicht enttäuscht werden! The height of these heels was perfect for me - as it didnt bother my back. Its little long to use it indoor. You wont regret buying this! I also have really small ears like I can choose between a youth and an infant baseball hat and they still fit in my ear canals really nicely with the right tips.