Features: The tuner features accurate digital tuning, LCD with 2 backlights showing current tune, white for flat/sharp and green for in tune. Clip-on design let it firmly clip on instrument, 360° rotatable head can be adjusted to any direction for clear reading when tuning. Powered by a CR2032 button cell(Not included), it will turn off automatically with 5 minutes idle operation, more power-saving. Can be widely applicable for chromatic, guitar, bass, ukulele(C/D), violin and more instrument tuning. This tuner is a great assistant for you to keep your instrument in right tune, suitable for daily use. Specifications: Color: Black Brand: LINGTING Model: LT-01 Tuning Items: Chromatic/ Guitar/ Bass/ Violin/ Ukulele C/ Ukulele D A4 frequency: 440HZ Tuning : A0(27.5Hz) - C8 (4186.0Hz) Power Supply: 1 * CR2032 Battery (not included) Item Weight: 18g / 0.6oz Package Size: 5 * 4 * 3cm / 2 * 1.6 * 1.2in Package Weight: 25g / 0.9oz Package List: 1 * Clip-on Tuner 1 * User Manual (English & Chinese)