1.Tuning Item:Chromatic,Guitar,Bass,Violin 2.Good quality and cheap price. *A4 Frequency:410-450Hz *Tolerance: ±1cent *Tuning Item:Chromatic,Guitar,Bass,Violin *Tuning Mode: MIC , CLIP *Semitone flat:b,bb *Weight:50g *Dimension: 67(L)×44(H)×46(W)mm *Power: CR2032 Battery 1 piece *Color: Black JT-20 tuner