. * Small compact size; 360-degree rotation capability. * Simple one-button operation. Just click the button to switch modes and power. *Brilliant LCD screen changes color when you're in the sweet spot. * It will be a good option to keep your instrument in tune. * 5 main instrument operation modes - Bass, Violin, Guitar, Ukulele and Guitar 27.5Hz to 4186Hz for maximum tuning precision. * High detection accuracy and sensitive vibration clip. Designed for beginners and professionals. Specification: Brand: Aroma Model: AT-01A Material: ABS Tuning Components: Chromatic (C) / Guitar (G) / Bass (B) / Ukulele (U) / Violin (V) Pitch Range: 440Hz Tuning Accuracy: ± 0.5 cent Power Supply: 1 x CR2032 Battery (Included) Package Size: 6 * 5 * 4cm / 2.4 * 2.0 * 1.6in Package Weight: 35g / 1.2oz Suitable for: Guitar, Bass, Violin, Ukulele, Oud, Cello, Violaet Package Included: 1 x tuners + 1 x battery (CR2032)