Got this unit to do a church show. I needed to add some body pack mics quick to compliment my existing SHURE SLX setup. Of course these are not exactly the same quality as my SLX units. They don’t have assignable channels, so you would not be able to add units and the body pack units are not as sturdy as my SHUREs, but when you consider that you cannot even buy the SLX transmitter for the price of this 4-channel unit these things were just what I needed.I was concerned there may be interference on poor sound quality, and they did sound a hair less crisp than the SHUREs, but overall they were fine (no drop-outs or static) and no one in the audience could tell the difference between these and the SHUREs I had in the mix. These are VHF units – which don’t seem to get any respect due to the possibility of random baby monitor interference – but I had no such issues and also no possibility of these interfering with my UHF SHURE units.The unit comes with headset (DJ type) mics and lavaliere mics – neither of which I used since I opted for the less obtrusive head-worn mics – but that being said, out of the box you get everything you need to get going. Also a nice touch – the unit outputs individual channels AND a mix of all the channels, so you can control each mic from the mixer or (as in my case) save 3 channels on your board and use the mix from the unit.I probably would not get this if I had to use it every day, but for that occasional time when I need to add a few more body packs it fits the need perfectly.