Features 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. Specifications: Item Type: Guitar Smart Tuner Colour: Black Material: Metal + plastic Battery: 3.6V Lithium battery/2600mah Power Supply: For Android USB1.0A (1) Tuning Mode Instrument Selection Tuning Automatic Wooden Guitar 6E,5A,4D,3G,2B,1E Electric Guitar Classical Guitar Ukulele 4G,3C,2E,A 12 Average Law CC(#),DD(#),E,FF(#),GG(#),AA(#),B (2) Tuning Mode Instrument Selection Tuning Semi-Automatic Wooden Guitar 6E,5A,4D,3G,2B,1E Electric Guitar Classical Guitar Ukulele 4G,3C,2E,A (3) Tuning Mode Instrument Selection Tuning Special Tuning Wooden Guitar 6th E,D#,D,C#,C 5th A,G#,G 4th D,C#,C,D#,D,E 3rd G,F#,F 2nd B,A#,A,C 1st E,D#,D Package List 1 x Smart Tuner 1 x Head 1 x USB Cable