Blaupunkt is so proud of these little earbuds. BTW01 delivers perfect sound. And take comfort to the highest level. That is what you would expect from a true German. HD Stereo sound! Clarity and sound separation like you have never experienced. Each note rings true and clear. The bass is out of this world. And together they create a mind blowing feel that you will love. Its silicon MIC is the secret of the superior voice quality everyone raves about. This MIC picks up and delivers even the softest voice with amazing clarity. You will get 9hrs of playtime every time you charge the earbuds. And then pop them back into the case to top them up. The earbuds have their own batteries and so does the carry case. So you always have power. These earbuds are scientifically designed with a 45 degree angle to give your ears the perfect fir. Slip them on and you will feel how they sit snugly. No shaking loose. No slipping out. Google Assistant and Siri are at your service here. Now your voice is their command. So let them do the searches, changing of tracks and managing all the other controls.