I ordered the QTX amp that came with two wireless microphones and two additional inputs for either a guitar and another microphone. I had read the information on the site and a few reviews and thought it was ideal. The item arrived quickly and well packaged. The microphones were supplied with two heavy duty 9v batteries (they only lasted one hour on first use) Trying it for the first time on 28th February the mics were clear and when music was played on its own, it sounded great. Unfortunately when using the microphones at the same time as music is playing the music cuts out. So, as a PA for giving presentations it's great. But if you want to speak or sing with the music (which was what we wanted it for) this is not the right model. I have been told by a professional musician who on seeing it ask why I didn't by the next size up an 18" as he immediately knew this problem would occur in seeing the item. ***Since this review Astounded contacted me directly and pointed out a small switch which is hidden amongst the inputs so discreetly I never knew it was there that once flicked resolved the issues of mics cutting out, so 10 out of 10 for customer service, going above and beyond! ***