1.Gleam Human Vocal Metronome 2.Power: 9V batteries or DC 3.Timbre: Vocal, Woodblock, Mechanical metronome Gleam Human Vocal Metronome Brand: GLEAMModel: GMT-300 Vocal MetronomeColor: whiteWeight: 300gTimbre: Vocal, Woodblock, Mechanical metronomeRhythm:0(-/4),1/4, 2/4, 3/4, 4/4, 3/8, 6/8Tuning accuracy: ± 1 centA4 Frequency : 435-445HzTuning range: A1 ( 55Hz ) ~A3 ( 1760Hz )Tuning modes: ...