... . JT-22B *A4 Frequency:430-450Hz *Tolerance: ±1cent *Tuning Item:Chromatic,Guitar, Bass, Violin, Ukulele *Tuning Mode:MIC, CLIP *Semitone flat ... : BlackJT-22C *A4 Frequency:430-450Hz *Tolerance: ±1cent *Tuning Item:Chromatic *Tuning Key:C,F,Bb,Eb *Tuning Range: A0(27 ... )mm *Power: CR2032 Battery 1 piece *Color: Black Tuning Item:Chromatic,Guitar, Bass, Violin, Ukulele