Professional Clip on Digital Beat Tempo Metronome LCD Screen Lightweight & Mini for Violin Guitar Bass Musical Instrument Black Clear LCD display and indicator light with & or down adjuster for Rhythm Types Tempo Beat & . 0~9 beat multiple rhythm 30 to 280bpm tempo. Built-in TAP function enables you to test your ideal tempo & tempo of a melody. With 3.5mm stereo earphone jack powered by 1 * 2032 cell battery(not included). Clip & lanyard hole design for convenient carry and easy to fix. Professional digital metronome universal for all instruments that need beat or tempo easy to use. Note: guitar is not included. battery is not included. Specifications: Accuracy: +-0.001 Color: Black Item Weight: / 0.6oz Package Size: 12 * 8 * 3cm / 4.7 * 3.2 * 1.2in Item Size: 5.5 * 3.3 * 2cm / 2.2 * 1.3 * 0.8in Tempo : 30~280 Bpm Earphone Jack Dimension: 3.5mm Beat: 0~9 Material: Package Weight: 27g / 1oz Supply: 1 * 3V(2032) Battery(Not Included) Package List: 1 * Metronome 1 * User s Manual(Chinese / English)