I've owned another model of the Korg tuner, gave it away, and now have this handy tuner/metronome. It's a great tool to have, particularly if you plug it into a chain that has a mute switch contained in it. And, of course it has that metronome built in, in case you don't have perfect mental tempo ticking. I tend to speed things up a bit, so this prevents the "runaway train" during rehearsal. Great price and fast shipping as always from Shoreline.