20MM copper buzzer self-excited buzzer three-pole passive piezoelectric ceramic feedback 4.0kHz

Piezoelectric ceramic buzzer is a piezoelectric ceramic sound emitting element with a sheet-like shape, suitable for use in miniaturized and thin electronic and electrical product, such as electronic watches, household appliances, electronic toys, instruments, remote control appliances, and other electronic product for sounding and signals. It can also be used as a sound sensor for voice controlled electronic product.
Piezoelectric ceramic buzzer
Divided by thickness frequency: ordinary type, thin type, ultra-thin type, and specific type;
According to their different shapes, they can be divided into various special shaped product such as circular, crescent shaped, elliptical, eccentric, square, and circular.