1. Introduction
The Enya ST1 Smart Automatic Guitar Tuner is a versatile device designed to simplify the tuning and re-stringing process for various stringed instruments. It combines the functions of an automatic tuner, a string winder, and a metronome into a single, compact unit. Utilizing advanced vibration detection technology, the ST1 ensures precise tuning even in environments with ambient noise. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to help you maximize your experience with the ST1.

2. Key Features
- Automatic Tuning: Effortlessly tunes acoustic and electric guitars, as well as ukuleles, with high precision.
- Semi-Automatic Tuning: Allows selection of individual strings for targeted tuning.
- String Winder: Integrated function for quick and easy string changes.
- Alternative Tuning Support: Supports various alternative tunings for guitars and Low G tuning for ukuleles.
- High Accuracy: Guarantees tuning accuracy within 1 cent, suitable for noisy environments.
- Full-Color LCD Screen: Provides intuitive visual feedback during operation.
- Built-in Metronome: Helps maintain rhythm and timing during practice.
- Rechargeable Battery: Equipped with a 3100mAh battery for extended use.

3. Setup
3.1. Charging the Device
Before first use, fully charge the Enya ST1. Connect the included USB charging cable to the device's charging port and to a standard USB power adapter (not included) or a computer's USB port. The battery indicator on the screen will show charging status. A full charge provides approximately 5-8 hours of continuous use.
3.2. Powering On/Off
To power on the ST1, press and hold the central Mode button until the screen illuminates. To power off, press and hold the Mode button again until the screen turns off.

4. Operating Instructions
4.1. Device Controls
The ST1 features a simple three-button interface:
- Up Button (▲): Navigates up through menu options or increases values.
- Mode Button (●): Selects options, confirms settings, or switches between main modes (Tuner, Metronome).
- Down Button (▼): Navigates down through menu options or decreases values.

4.2. Tuning Modes
The ST1 offers three primary tuning modes: Auto, Semi-Auto, and Alt.TUN (Alternative Tuning).
4.2.1. Auto Mode (Standard Tuning)
This mode is ideal for quick and efficient tuning, especially when re-stringing. The ST1 automatically detects the string and tunes it to the standard pitch.
- Select
