Feature: 1. Multifunctional String Instrument Tools: Suitable for string instrument players of intelligent tuner, winding instrument 2 in 1 multifunctional string instrument tools. 2. Multiple Modes: Support automatic tuning mode, semi automatic tuning mode and custom tuning mode, different modes are designed to optimize the tuning experience. 3. Application: It is suitable for acoustic guitar, classical guitar, electric guitar, ukulele and half tone, and equipped with color LCD display to adjust the state, easy to use. 4. Easy to Use: Quickly and easily swing, just press the UP DW button, you can quickly tighten or loosen the strings, saving time and energy; Directional indicators allow you to easily confirm the direction of the wing. 5. Large Battery Capacity: The built in 2600mAh lithium battery can be recharged via the included USB cable, and the charging indicator lets you know the current battery capacity. Specification: Item Type: Automatic Guitar Winder Weight: 333g/11.7oz Product Material: ABS Battery Capacity: 2600mah Battery Type: lithium battery (shipped with built in battery). Package List: 1 x Automatic Winder 1 x Data Cable 1 x Head Accessories 1 x Instruction Manual