... Applications (Piezoceramics element; Piezo diaphragm, piezo plate)1, For sound making:Clocks,Calculators,Telephones,Washing machines,Various(Burglar alarms ... ,etc);2, For transduction: Embryo monitor,Heart reflectoscope reflector,pedometer, car alarm ... , Connection terminal: Solder wire or not. Piezoelectric Ceramic For Ultrasonic Equipment