Features:With high precise and sensitive vibration clip， you can tune out of the noiseWith high light LED cent-display， you can use it no matter dark or light1 step of flat tuning are half step down and whole step downMulti-angle view with the 360??rotational clip designString number and Pitch name make the tuning unprecedented easyUltra-low-power and auto power-offSpecifications:Brand: MeidealMaterial: PlasticsTuning Instrument:Violin，MandolinA4 Calibration:440HzDetection Range:A0(27.5Hz)~A6(1760Hz)Tuning Accuracy:?��1CentFlat Tuning: bPower Supply: 3v(CR2032)Size: 66*55*16mm/ (L*W*H)Colors:BlackNotice: There might be 1-3cm(0.39-1.18inch) deviation due to manual measurement. There might be slight colour deviation due to different display. Package includes: 1 * Tuner1 * CR2032 Lithium battery1 * Manual