It's crap, not accurate and at the stage having a lot of stuff connected to the same power source makes it even more bad, hey it's a behringer what could we expect?
I use mine only as a rack light and to give our drummer a start beat in rehearsalls when we think the beat is wrong.
It's good as rack light and metronome but it sucks as a tuner, I prefer any korg tuner.
It's was an impulse buy for the most part but it was better than the ****ty pedal tuner I had. I figured for $30 it was worth thie risk persay seeing as how most of the rack mount tuners I've looked up are $80 and up.