<b>Specifications:</b><br> 3 In 1: Metronome, Digital Tuner and Tone Generator<br> Tuning Instrument: Guitar, Bass, Violin, Ukulele, Banjo, Mandolin<br> Tuning Keys: Chromatic, F, Bb, Eb<br> Detection Range: 27.5Hz (A0)-4186Hz (C8)<br> Tempo Range: 30-280bmp<br> Tuning Mod: Clip on pick up<br> Tuning Accuracy: ±1Cent<br> A4 Calibration: 430-450 Hz<br> Charging Voltage: 5V<br> Auto Power: Ultra-low-power and auto power-off<br> Power Supply: Built-in Rechargeable Lithium Battery(120mAH)<br> Net Weight: 51g<br><br> <b>Caution:</b><br> 1.Do not use alcohol, gasoline and other strong cleaning chemicals to clean the LCD screen or body case.<br> 2.Do not hit or the body case or screen beside the top. Otherwise it will lead to machine failure.<br> 3.Do not use or keep at high temperature, heat, humility place.<br> 4.When the battery is insuffucuent, please use the charger to charge.<br> 5.If the product is updated and improved, without notice change. <br><br> <b>Package included:</b><br> 1 X Donner DT-4 3 in 1<br> 1 X USB Cable<br> 1 X Product Manuel <br>