Dzs Elec 15Pcs 35Mm Piezo Disc Transducer Contact Microphone Trigger Sound Sensor With 4 Inches Wires For Acoustic Instrument

Specification Plate Material: Brass. Resonant Frequency: 1.8 +/- 0.3 Khz. Resonant Impedance: Less Than Or Equal To 300 Ohms. Static Capacitance: 50000Pf +/- 30%. Storage Temop:-30 Degree Celsius-+70 Degree Celsius. External Diameter: 35Mm / 1.38 Inch. Inside Diameter: 24Mm / 0.94 Inch. Lead Length: 10Cm /3.94 Inch. Package Contents: 15 Pcs. Suitable For Diy Projects, Contact Microphones, Cigar Box Guitar Pickups, Touch Sensors, Drum Triggers, Homemade Speakers, Buzzers, Etc.