... performance product.Specifications:Function:Tuner,Metronome,Tone Generator.Tuner:Tuning Mode:Auto,Manual.Tuning range: 12-note full range chromatic, 0A - 7C ... Frequency range:440HzHigh-precision LCD needle-type meter for stable tuning.LCD Display:Color black-light display.Turning method:choose ... Colour:blackPackage included:1 x Guitar Tuner1 x User Manual 3 in 1 Guitar Tuner,Metronome,Tone Gernerator