... of microwave ovens, computers, calculators, telephones, electronic and toys . One.Piezo Ceramic Element Applications1. For sound making:Clocks,Calculators,Telephones,Washing machines ... 20million pieces . Nowadays , it has over 500 employees , 6000m2 of manufacturing plant , and 200 sets of production and test facilities and ... won a very good reputation for the past 21 years. Piezo Ceramic Element