I bought this for a small church streaming setup. I give this product two stars, each representing one month of functionality. After those two months, the packs just turned themselves off after 1-2 minutes of use. I tried adjusting the channels and volume but nothing worked. I'm pretty sure the packs were charged and ok, but it still automatically cut off in the voice or vocal needle. They were also not placed so far from the singers that they were out of reach. Look for the best product. This one isn't worth your time.