12x5.5mm Piezoelectric Transducer Buzzer 9V 5mA Our products are widely used in home appliances, cars, electric bicycles, medical devices, cordless phones, computers, alarm systems. We are able to make 7 to 9 million pieces monthly based on our professional engineers, advanced audio analyzers, ISO 9001, ISO 140001 and QS 9000 certifications. The piezoelectric buzzer for external drive produce exceptional sound output and efficiency all while meeting each customers unique performance requirements. Piezo transducers are constructed without magnets, instead they create sound mechanically via the piezoelectric effect. From product designing, purchasing and testing, every step is controlled strictly by our QC staffs in order to make sure the perfect quality of our products. Currently, over 70% products are exported to US. South East Asia and Europe. With professional skills, enthusiasm and ambition, we are looking forward to corporate with you. Welcome t…