Feature: 1. Multiple Tuning Modes: This smart guitar tuner features multiple tuning modes, supporting auto tuning mode, semi auto tuning mode and custom tuning mode, with different modes designed to optimize the tuning experience. 2. Easy To Operate: This electric guitar tuner is easy to operate, you just need to press the UP or DW button to quickly tighten or loosen the strings, saving you time and effort, and the directional indicator makes it easy for you to confirm the direction of flight. 3. Color LCD Display: This acoustic guitars auto tuner features a color LCD display that clearly shows the tuning status, allowing you to tune more accurately, which is very convenient. 4. Excellent ABS Material: This electric guitar professional tuner is made of excellent ABS material, which is sturdy and durable, not easy to be damaged, and has a long service life. 5. Wide Application: This smart automatic guitar tuner has a wide range of applications and is suitable for acoustic guitars, classical guitars, electric guitars, ukuleles and so on. Specification: Item Type: Smart Guitar Tuner Material: ABS Battery: 2600mAh Lithium Battery (Shipped With Built In Battery) Application: Guitar, Ukulele, 12 Tone Equal Temperament Instruments. Package List: 1 x Smart Guitar Tuner 1 x USB Charging Cable 1 x String Winder Replacement Head