If you're seeking the quintessential metronome – the timeless design that has guided generations of musicians, including your grandparents, without the need for batteries – then the **Cherub M-20 Mechanical Metronome** is your ideal choice. This classic device embodies reliability and simplicity, providing an authentic rhythmic experience.

Parameters:

• Tempo Range: 40~204 bpm
• Beat: 0, 2, 3, 4, 6
• Tempo Precision: $\pm1$%
• Metronome Sound: Mechanical Sound