Detailed Product Description

Features:
1) This product consists of a piezoelectric ceramic plate with
    electrodes on both sides and a metal plate
2) The piezoelectric diaphragm is designed to expand and bend in
    a fixed direction (the metal plate bonded to the diaphragm does
    not expand)
3) When the diaphragm shrinks, and voltage is applied across the
    electrodes, sound waves are produced in the air