DESCRIPTION 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 Package List: 2 * LCD Tuner