The TGI99B metronome offers accurate timekeeping from 40-230 BPM. It will play in a variety of signatures including 4/4, 3/4, 3/8 and 6/8. The built in tuner comes with contact microphone directly picks up the vibration of the instrument so it can be tuned. Even in noisy surroundings it can still tune accurately. Tuning Range: A1 (55Hz) - B7 (3951.07Hz).Pitch Shift: 430Hz - 449Hz. Dimensions: 96mm x 60mm x 13mm.