1、2 in 1 Design: Guitar tuner and capo, suitable for pitch calibration and string instrument tuning. The tuning range is A0(27.5Hz)‑C8(4186Hz), and A4 reference adjustment range is 430Hz‑450Hz. 2、High Performance: This guitar tuner capo has the advantages of high sensitivity, good accuracy, less interference, quick response, and excellent performance, making it suitable for various scenarios. 3、Convenient Use: Get a graphical display that displays analog needle to improve tuning accuracy, the color of the display screen will also change to indicate that you have tuned the strings accurately. 4、Applicable Range: This tuner capo provides stable clamping, suitable for acoustic guitar, electric guitar, classical guitar, and ukulele, and is suitable for various string instrument performance scenarios. 5、Compact Design: This capo tuner features a compact size and lightweight design, equipped with an LCD screen for clear and intuitive display. CR2032 battery (not included) powered, simple and convenient.