3 in 1!! The MT-40W has a Metronome, Chromatic Tuner AND Tone Generator all in one great compact package. The HUGE display gives you all the parameters that you can adjust using the large control buttons. Plug in your electric instrument, a pickup for your acoustic, wind or brass instruments into the 1/4 in (6.3mm) input jack or use the built-in microphone. WIth all these important features, the MT-40W is tough to beat!