All-in-one tuner, metronome, and tone generator. Includes contact microphone. Powered with 2 AAA batteries (batteries not included). Tuner features: Chromatic Detection range: C1 (32.7Hz) – C8 (4186.01Hz) Pitch range: 410 – 450Hz Tone range: 1E – 6C Notes Tuning accuracy: ± 0.5 cents Metronome features: Tempo range: 30bpm – 260bpm