Piano Mechanical Metronome Antique Metronome Pendulum Mecanico Universal for Piano Guitar Violin Musical

Features:
The mechanical metronome uses a winding mechanism for power to produce metrical beat.
Produce a clear and loud sound for use when practicing piano, violin, guitar, bass, drums and other musical instruments.
The pendulum offers great visual tempo cues which makes it for beginners learning difficult passages.
High flame retardant steel movement, corrosion resistance, oxidation resistance, long-term use without calibration.
Clockwork adopt aviation grade spring steel, after ten thousand times the test, non-elastic changes, resistance to metal fatigue.