The sound quality is so good that you can clearly hear the lyrics in certain songs you have listened to over and over and were unable to discern all the lyrics before, you can hear the lyrics better coming out of the Astrotec S80 Plus True Wireless Earbuds. Very annoying. And if you wish, you can have one bud charging while you listen using the other. With the deals on this power block, I have 3 total. Love these such a great deal for the quality. It was also much more noticeable and annoying than the chirping, and a big reason I decided to return them. So comfortable, yet beautiful and fashionable, goes with everything! Needed extra storage in my new studio apartment. Returns not allowed ??. I am not sure how to fix this other than using an elastic band around the case.