Rechargeable via USB Charging Cable Our guitar tuner features a built-in rechargeable battery, eliminating the need for button battery replacements and offering an environmentally friendly solution. It charges quickly using the included USB cable with a PC or mobile power bank, providing over 10 hours of continuous use on a single charge. The violin tuner includes an automatic power-down function that activates after 5 minutes of inactivity to conserve energy. Note Key Function The clip-on guitar tuner includes a note key function designed to meet the needs of most professional guitar players. When in G (Guitar) tuning mode, a short press of the button allows switching between various guitar tunings, including DROP D, OPEN G, OPEN D, OPEN E, and flat tunings (b, bb), enabling a wider range of playable songs. High Sensitivity and Incredible Accuracy Equipped with highly sensitive vibration-based tuning technology, this tuner delivers fast and accurate results even in noisy environments. Unlike lower-quality tuners, it reliably detects the low E string of a bass guitar without flickering or signal loss. Compact Size and Large Screen The ukulele tuner features an almost frameless design with a large, full-color LCD display for excellent visibility, even in low-light conditions. The 360-degree rotatable clip allows for flexible screen positioning. The tuner’s compact clamp is precision-engineered to fit comfortably in a pocket or at the end of a guitar case. Great Gift for Stringed Instrument Players This violin tuner offers four tuning modes—Chromatic, Guitar, Violin, and Ukulele—making it suitable for a wide variety of stringed instruments such as mandolin, banjo, and most acoustic and electric string instruments. It comes packaged in an elegant gift box, ideal for gifting to musicians and music lovers.