DZS Elec 15PCS 35mm Piezo Disc Transducer Contact Microphone Trigger Sound Sensor with 4 Inches Wires for Acoustic Instrument

Plate Material: Brass.Resonant Frequency: 1.8 +/- 0.3 KHz., Resonant Impedance: less than or equal to 300 Ohms .Static Capacitance: 50000PF +/- 30%., 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.