Feature: 1. LCD white and green screen to indicate operational condition. 2. More accurate, high sensitive and wide tuning range. 3. Smart sleep after 3 minutes with no play. 4. 360-degree rotation for flexible using. 5. For guitar, bass, ukulele, chromatic and violin. 6. More accurate, high sensitive and wide tuning range. 360-degree rotation for flexible using. 7. Clip designed to attach to instrument. Hide behind the guitar neck, concealing it from audience. 8. Power-saving mode: smart sleep after 3 minutes with no play. 9. For guitar, bass, ukulele, chromatic and violin. Lightweight, mini-sized, compact and convenient to carry. Specification: Features: LCD white and green screen to indicate operational condition. More accurate, high sensitive and wide tuning range. 360-degree rotation for flexible using. Clip designed to attach to instrument. Power-saving mode: smart sleep after 3 minutes with no play. Hide behind the guitar neck, concealing it from audience. For guitar, bass, ukulele, chromatic and violin. Lightweight, mini-sized, compact and convenient to carry. Specifications: Material: Plastic Colors: Black Model: JT-306 Fit: For guitar, bass, ukulele, chromatic and violin Tuning Range:A0(27.50Hz)--C8(4186Hz) Calibration:410-450Hz(1Hz Steps) Power: A 3V-CR2032 Lithium Battery (not included) Item Size: 4.5 * 2.8 * 4cm / 1.8 * 1.1 * 1.6in Item Weight: 17g /0.6oz Package Size: 5 * 3.5 * 4.2cm / 2 * 1.4 * 1.7in Package Weight: 30g / 1oz Package List: 1 * LCD Tuner 1 * User Manual (English & Chinese) Package List: 1 * LCD Tuner 1 * User Manual (English & Chinese)