Single-button stompbox gives you great sounding guitar controlled harmonyAdds 1 or 2 voices of realistic vocal harmony set manually or guided by your guitarNo theory needed - just play your guitar through VOICETONE H1 to automatically create great sounding harmonySimple 3-knob control gets you up and running in secondsHigh-quality, low-noise mic preamp for pristine vocalsOn/off foot switch for quick performance control Allows chaining to other VOICETONE SINGLES vocal processors or DITTO MIC LOOPER to expand creative possibilities, Compatible with remote Mic Control using the TC Helicon MP-75 microphone, Rugged, road-worthy construction for years of dependable use, Power supply included.