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3-in-1 metronome, tuner, and tone generator for use with any musical instrument; ideal for a guitar, bass, ukulele, or violin Metronome provides a precise tempo, a tempo range of 30 - 250 beats per minute (bpm), and an electronic metronome sound Tuner offers a wide range (A0-C8), flat tuning, and multiple tuning modes (chromatic, guitar, bass, ukulele, and violin) for versatility, plus auto and manual tuning, an LCD display with LED indicators, and 2 detection methods (mic and line-in) Precise tone generator provides a reference tone range of chromatic 2A - 6A; device turns off automatically after 3 minutes if no signal; freely rotates 360 degrees for easy access; battery powered (batteries not included) Measures 4 by 2.6 by 0.2 inches; backed by an Amazon Basics 1-year limited warranty