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: PlasticColors: BlackModel: JT-306Fit: For guitar， bass， ukulele， chromatic and violinTuning 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 * 1.6inItem Weight: 17g /0.6ozPackage Size: 5 * 3.5 * 4.2cm / 2 * 1.4 * 1.7inPackage Weight: 30g / 1oz Package List:1 * LCD Tuner1 * User Manual (English & Chinese)