Very beautiful, loud and pleasant sound. They have a rubber ring that you can put inside to protect them from bumps and rolling off the table. The only thing I complain about is the cheap plastic plug, which is not needed, but rounds off the microphone visually. My criticism is that it has to be rubber like the guard ring. because if someone drops the mic the cap will almost certainly break, it's such cheap brittle plastic it doesn't seem to do it. Retirees/disabled high-rise buildings, karaoke classes. They had enough range to walk through a 60 x 60 foot public space and were still working on a set of 2000mAh batteries after two and a half hours. Everyone loved her. My only wish is that they have separate volume controls on the mic. They are problematic in duets with a loud and a quiet voice. There are no other issues to report.