I have bought a couple of these units to enable some acts i regularly do sound for, to use in ear monitoring at an affordable price. They are light yet rugged, and they have all the features that you need from a little unit like this. just pop a 9v battery in and you have in ear monitors! They use them in focus mode so i have a Click mix with just the click and then they each have their own mix, but it means that they can choose ho much click they want in each song, and they still get a volume control! i will be buying more of these!!!