I definitely recommend this device and this seller. They stopped working with my phone after some time. They must be removed to charge as they do not fit in the charging case. I tried to give them away but everyone has found them very uncomfortable. Audio for speech podcasts was normal. The stitching on them was very poorly done as well. Great idea for a new line of shoes! I don’t think that is as important as sound quality though. Worked perfectly. For music, its great sounding and loud.