Very clean and real sound. A work colleague recommended this brand to me but I found out the hard way that they are an inferior brand. I havent had them long enough to find out what the battery life is like. I was sitting up after doing some flys and the corner of the bench completely snapped and almost caused me to injure myself. Also, the unit arrived with only one key instead of two but the seller put another key in the mail the same day I contacted them about it. The two things I dislike about it is that the directions are close to non-existent. This means that it isnt compatible. They seemed very cheaply made. I did a lot of research for a good headset stand because I wanted one that could also charge my phone wirelessly to reduce my desk clutter. After tying many pairs (of Merrell, North Face and Keen), finally this shoe fits my kiddos feet.