Boss TU-03 Clip Tuner; compact and simple to operate chromatic clip on tuner and metronome, fast and accurate tuning performance with five different modes, advanced metronome functionality with a built-in speaker and numerous pattern/beat variations, Tuner: Tuning Range: A0 (27.5 Hz)--C8 (4,186.0 Hz); Reference Pitch: A4 = 430 Hz - 450 Hz; Tuning Accuracy: +/-1 cent; Tuning Modes: CHROMATIC / GUITAR / BASS / Violin / UKULELE C; Flat Tuning: up to 2 semitones lower; Metronome: Tempo: 30-250 BPM; 8 Rhythms; 10 Beats; dimensions (W x D x H): 66 x 42 x 35 mm, (2,6" x 1,65" x 1,38"); weight: 40 g (2 oz)