Feature:1. This is a smart tuner and winder 2 in 1 multifunctional stringed instrument tool, suitable for stringed instruments.2. The smart tuner supports automatic adjustment mode, semi-automatic adjustment mode and custom adjustment mode, different modes designed to optimize the adjustment experience.3. Suitable for acoustic guitar, classical guitar, electric guitar, ukulele and chromatic tuning, and has a color LCD display to display the tuning status, which is easy to use.4. Quick and easy wing, just press the UP/DW button, you can quickly tighten or loosen the strings, saving time and energy; direction indicator allows you to easily confirm the wing direction.5. This guitar tuner has a built-in 2600mA lithium battery that can be charged via the included USB cable, and the charging indicator lets you know the current battery capacity.Specification:Item Type: Guitar Smart TunerColour: BlackMaterial: Metal + plasticBattery: 3.6V Lithium battery/2600mahPower Supply: For Android USB1.0A(1).Tuning ModeInstrument SelectionTuningAutomaticWooden Guitar6E,5A,4D,3G,2B,1EElectric GuitarClassical GuitarUkulele4G,3C,2E,A12 Average LawCC(#),DD(#),E,FF(#),GG(#),AA(#),B(2)Tuning ModeInstrument SelectionTuningSemi-AutomaticWooden Guitar6E,5A,4D,3G,2B,1EElectric GuitarClassical GuitarUkulele4G,3C,2E,A(3)Tuning ModeInstrument SelectionTuningSpecial TuningWooden Guitar6thE,D#,D,C#,C5thA,G#,G4thD,C#,C,D#,D,E3rdG,F#,F2ndB,A#,A,C1stE,D#,DPackage List:1 x Smart Tuner1 x Head1 x USB Cable