Boss TU-03

SPECIFICATIONS

Tuner:

Tuning Range: A0 (27.5 Hz)--C8 (4,186.0 Hz)
Reference Pitch: A4 = 430 Hz--450 Hz
Tuning Accuracy: +/-1 cent
Tuning Mode: CHROMATIC / GUITAR / BASS / VIOLIN / UKULELE C
Flat Tuning: Regular--2 semitone lower

Metronome:

Tempo: 30--250
Rhythm: 8 Types
Beat: 0--9

Power Supply: CR2032 lithium battery x 1

Current Draw:

30 mA (Metronome mode)
15 mA (Tuner mode)

Expected battery life under continuous use: 8 hours