[High Performance] Resonant frequency 3.2+/- 0.5 KHz, low power consumption and high sensitivity.
[Size] Piezo discs diameter 50mm/ 1.97 inches, thickness 0.4mm/ 0.02 inches; small, thin and lightweight, package: 5 Pcs x buzzer film.
[Material] Made of brass and ceramic, temperature resistant, stable, durable and long service life.
[Easy To Use] These piezo discs transducer are easy to install, foot-stompers and other home-made instruments for sound and vibration detection.
[Wide Usage] Perfect for beginner to use as touch-sensors, electronic drum triggers, buzzers, make your own contact mics, also used for watches, cameras, phones, electronic , computer, etc.