Piezo microphone--when an voltage is applied, it will produce mechanical vibration; on the contrary, when the mechanical force is applied, it will also produce a voltage signal,Diaphragm Disc
Pickup copper --mainly made of sturdy and copper material, it ,Piezo
Piezo pickup--suitable for guitars, microphones and other musical instruments, very practical,Piezoelectric Disc
Copper --wide range of applications, guitars, touch sensors, electronic drums, buzzers, etc,Trigger
Guitar accessory--with practical functions, it is a piezoelectric ceramic sound-producing device, which can serve you very well,Guitar