Fantastic unit 10 stars. One of the best echo units I have ever owned and I have owned a lot since the 1970s includinbg the old tape echo units! I use it for sax directly from a bell bug mic. The selling factor was that it uses XLR connectors. You can just use it in-line by connecting straight into a mic XLR cable on stage. It has every feature you could want from an echo unit including an analogue replication button, tap echo, sound on sound, 2 perfect pre-set slap back echos, pre-set timed echos and user set echo from micro short to looooooong. Pre-amp gain control, infinite repeats, excellent mix option, swell and so on. BUT, no battery option which, to me is no big deal, because the power supply is all you really need and it won't need changing half way through a set ... this is for vocal and horns not for guitars really. I never use my delays on battery power ... good analogue sounding delay always takes a lot of power. There's no tone control but you don't need it because it produces such a great neutral sound and, you'll be using it in-line, pre-mixer anyway. This unit is rugged. The dry/wet mix and repeat buttons could be a bit tighter so the settings stay where you set them last time but hey, it never hurts to keep everything in check …