... Low noise operation;5. Low cosumption;6. Small fog particles;7. Long operation life;8. High stability ... piezoelectric ceramic element, SMD magnetic transducers, condenser microphones, ultrasonic sensor,Atomization piece, speakers and other audio components. And ... , watches, toys, alarm systems, reversing radar, ultrasonic cleaning, ultrasonic atomization, marine fish exploration, the range of ultrasound ...