... quality silicone cushion 4.2-color screen backlight New Digital LED Electronic Acoustic Guitar Tuner TunerTuning mode: chromatic, guitar, bass, ukulele, violinTuning ... onlyPitch range: 430-450HzFlats: b, bbTuning tolerance: +-0.5 centMetronomeTempo range: 30-260bpmBeats: 0,1,2,3,4,5,6,7,8 ... coin battery, 1 pieceDimension: 56*60*45mmWeight: 35g New Digital LED Electronic Acoustic Guitar Tuner