Features: 【APPERANCE DESIGN】This guitar tuner is easy to move, it can be removed easily to save the storage space, and not easy to over-rotate and to loosen after frequent use. Featuring quick and accurate tuning, large screen, and strong clamp that is adjustable for a variety of viewing angles. 【LED COLOR DISPLAY AND METRONOME】With the color LED display of this guitar tuner clip on, you can easily know whether the tone is too low or too high. You can position the screen in any way you like. And this tuner also acts as a metronome, with one button you can easily jump into beat mode to listen to various beats. 【USB CHARGING CABLE】Ultra-low-power and auto power-off function saves energy and for maximum battery life. Quickly charges with included USB cable on your PC or mobile power bank. The tuner saves energy with automatic power-down after 3 minutes of no signal. 【PRECISE TUNING】With the standard tone, you can use this tuner to adjust many instruments, such as Guitar, Bass, Violin, Banjo, Ukulele etc. You can tune any string, brass or woodwind instrument. With a 360º swivel mechanism and the largest clip opening available, it fits onto almost any instrument. Specifications: Material: ABS Tuning Instrument: Guitar, Bass, Ukulele, Violin, Banjo Tuning Keys: Chromatic Tuning Mode: Clip on Pick Up Detection Range: 27.5Hz(A0)-4186Hz(c8) Tuning Accuracy: ±1Cent A4 Calibration: 430-450Hz Power: Li-on, 120mAh Charging Voltage: 5V Tone Range: 2A-6A Beat: 0~9 Tempo Range: 30-280bmp Item Size: 47 * 46 * 20mm / 1.85 * 1.81 * 0.79in Item Weight: 33g / 1.16oz Package Weight: 76g / 2.68oz Package Size: 13 * 6.2 * 2.5cm / 5.12 * 2.44 * 0.98in Package List: 1 * Tuner 1 * Micro USB Cable 1 * User Manual (English)