Practical Piezo Discs Brass Acoustic Discs 15 PCS 300?? Max 4.6 ?? 0.5 KHz

15x Piezo Discs. High Performance Resonant frequency 4.6+/- 0.5 KHz, resonant impedance 300 ohms max, low power consumption and high sensitivity. Resonant Frequency:4.6± 0.5 KHz. High Quality Made of brass and ceramic, temperature resistant, stable, and long service life.

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