Feature: 1. VERSATILE TUNING: Our guitar tuner is suitable for a variety of instruments including violin, bass, guitar, and ukulele. It covers the twelve tone equal temperament tuning system. 2. WIDE TUNING RANGE: The tuner has a range from A0 (27.5Hz) to C8 (4186Hz) and supports transpositions such as B Bb Bbb. 3. HIGH CONTRAST COLOR DISPLAY: Featuring a high contrast color display, our tuner provides optimal visibility. The sturdy, flexible clip allows for the best viewing angle. It also has an automatic shut off function to maximize battery life. 4. RECHARGEABLE BATTERY: The built in rechargeable lithium battery provides up to 10 hours of continuous use on a full charge. It automatically shuts off after 5 minutes of no signal input, saving power. 5. EASY TO USE: The tuner can be easily clipped onto your instrument, and you can tune with just one hand. It is lightweight, portable, and compact, making it convenient for on the go musicians. Specification: Item Type: Clip On Tuner Material: ABS Battery: 180mAh lithium battery (included) Tuning Range: A0(27.5Hz)-C8(4186Hz) A4 Frequency Range: 440Hz Tuning Items: Equal temperament, Guitar, Violin, Ukulele . Package List: 1 x Guitar Tuner 1 x USB Charging Cable 1 x User Manual (English and Chinese)