Theunit works very well but its features are not as user friendly as could be. For instance, it has only a main bottom, besides volume, which makes turnong one/off and calling not as crisp as the unit I had before which had a on/off slide swicth and the hanging up/calling bottom separate.Otherwise the sound is fair.CómodoLike the design.Sound quality is not the greatest for music, but not horrible- I'm just using for listening to podcasts in the car and taking calls hands free, so works well for me. A little uncomfortable in the ear for more than an hour's use. Battery life seems good, will drain faster if listening to music at a higher volume. For $10 I can afford to upgrade later if I feel the need to.Sound is crispy clear love the feature when it tells you the incoming caller need the ear hook longer but I believe it’s my ears would buy aginI like how it fit and the featureSound is a little tinny, and the instruction manual is small print and hard to read but it works well for what I need. I drive a truck and I need this to maintain contact with my dispatcher and it is great for that. Background noise is quieted a lot with this.It stop working about 3 day ago. I got it Dec. 3 ,and I did not use it until March 1 2019. I guess for the money it's good. I don't if it was something I did. I'm going to buy it again, and keep a eye on the return time.