Boss Pro Clip-On Chromatic Tuner & Metronome

TunerTuning 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: 0–9Power SupplyCR2032 lithium battery x 1Current Draw30 mA (Metronome mode)
15 mA (Tuner mode) Expected battery life under continuous use8 hours
* These figures will vary depending on the actual conditions of use. Auto off function Approx. 5 minutes Accessories Owner’s manual
CR2032 lithium battery Size and Weight