This Tuner/Metronome is the perfect gift for the budding musician. Accents down beat & tempo from 30 to 250 BPM. LCD meter, beat sounds on/off, back-light screen. Features Chromatic, Guitar, Bass, & Violin tuning and a built-in microphone & jack for electronic instruments. Calibrate from A=410 to 450Hz. LCD display clearly shows sharp or flat in cents. Automatic power off after 3 minutes without signal. Includes 1 pair AAA batteries.