Battery: CR2032(NOT Included)Description: This clip-on tuner and metronome is small in size, portable and easy to use. LCD digital display and backlight makes it easy to read. It has high sensitivity of tuning and high precision, mainly used for guitar, bass, ukulele, banjo and violin. Features: 2 in 1 multi-functional instrument accessory, not only a tuner but also a metronome, practical and portable. Large LCD digital display with high bright backlight design ensures a clear viewing. Convenient clip-on type tuner & metronome is easy to fix on string instruments. The clip swivels 360 degrees which allows you to view from multiple perspectives. High sensitivity of tuning and high precision, easy to use and operate. Specifications: Condition: 100% Brand New Material: Plastic Color: Black Tempo: 30~280bpm Beat Value: 0~9 Accuracy: +0.001 A4 Benchmark: 430~450Hz Tuning Range: A0(27.5Hz)~C8(4186Hz) Tuning Accuracy: +0.5 Cent Size: approx. 6 x 3 x 1.5cm / 2.4 x 1.2 x 0.6in Weight: approx. 48g Package Included: 1 x Tuner Metronome