This soundcore is absolutely top notch. I bought the first one and returned as it had a syncing issue. Then after that I repurchased, against other brands. Both am I glad I did. The bass is absolutely top top notch. Very deep bass. Very pleasant. I never had to increase the volume more than just 45 percent. One charge last 6 to 7 days with about 7 to 8 hours continued usage per day. The noise canceling mode is brilliant, it shuts down external noise to about 95%. In noise canceling mode, it's just me and my music no external noise at all. Nothing like this. Absolutely top class. The music is very clear. I use for making 20 to 25 calls every day. The voice on both sides are very good very good indeed. This soundcore Q20i is Top notch.