It is very sporadic. The quality of the wireless mic is as good as the best wired mics Ive heard. Comes with a key chain holder perfect for clipping in your bag for easier access. For the average person using should last far longer. I swore I did my best to put everything together but it can’t stay togetherThis thing is not stable at all. There are movable wheels underneath, which can be moved at any time. Bandeja triple para la doble SIM y la tarjeta SD. I will continue to buy even after this Im sold! 5 or 9 shoes and I got him the 8-9 size. Extending the bass another octave or more definitely enriches the sound without changing the character of the speakers.