Features:3 in 1 Design: Tuner， tone generator and metronome function all in one unit.Tuning through vibration， helps you to find the accurate tune of your instrument.The full featured metronome makes basic and complicated rhythmic patterns possible.Train your ear with the tone generator.Volume control knob to adjust the volume according to your needs.Headphone jack allows your to catch and listen to the rhythm via the earphone.Comes with LCD screen， gives you a very accurate and easy-to-read display.Equipped with holder， easy and convenient to use. Multi-instrument tool， great for electric， acoustic bass， guitar， violin， ukulele.Specifications:Color: BlackTuning Mode: AutoTuning Items: Chromatic， Guitar， Bass， Violin， Ukulele.Tuning Range: A0(27.5Hz) - A3 (1760.0Hz)A4 Frequency Range: 430Hz-450HzTolerance: ±1 centTempo: 30-250bpmBeat:0.1.2.3.4.5.6.7.8.9Tone Generator: G， 1-6 stings; B， 1-4 stings; U， 1-4 stings; C， 2A-6APower Supply: 2 * AAA batteries(not included)Item Size: 10.8 * 6.5 * 1.5cm / 4.3 * 2.6 * 0.6inItem Weight: 76g / 2.7ozPackage Size: 18.5 * 4.8 * 3cm / 7.3 * 1.9 * 1.2inPackage Weight: 143g / 5.0ozPackage List: 1 * Tuner1 * Cable with ClipNote: The battery is not included.