BOSS TU-30 Tuner & Metronome.

The TU-80 has been an essential tool for musicians and music educators. A compact size with Accu-Pitch, multiple tuning modes and rhythm patterns, the ability to sound reference pitches, and more.

• Pro BOSS tuner and versatile metronome in one
• Supports chromatic tuning, guitars, basses, and flat tuning
• Convenient Accu-Pitch function sounds a tone when you've reached the correct pitch
• Reference pitch function makes it easy to verify tuning by ear
• Metronome features multiple rhythm styles and visual display
• Instrument input for tuning electric guitars, basses, and other instruments
• Built-in mic for tuning acoustic instruments
• Runs on two AAA batteries