YQBOOM 10PCS 41mm Piezo Disc Transducer Contact Microphone Trigger Sound Sensor with 3.94 Inches Wires for Acoustic Instrument，Mic Drum Trigger Acoustic Pickup CBG Guitar

YQBOOM 10PCS 41mm Piezo Disc Transducer Contact Microphone Trigger Sound Sensor with 3.94 Inches Wires for Acoustic Instrument，Mic Drum Trigger Acoustic Pickup CBG Guitar

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.
These pre-wired piezo pickups are easy to install, foot stompers and other home-made instruments for sound and vibration detection.
Resonant frequency 3.0~5.0+/- 0.5 KHz, resonant impedance 300 ohms max, low power consumption and high sensitivity.
Made of brass and ceramic, temperature resistant, stable, durable
Lead Length: 10cm /3.94 Inch.Package Contents: 10 PCS.