Ultrasonic Ceramic Transducer Diameter:16mm; Frequency:1.7MHz; Useage:Ultrasonic atomizer; Ultrasonic Ceramic TransducerDiameter:16mm;Frequency:1.7MHz;Useage:Ultrasonic atomizer; Dongguan cosson electronic plasic ... household appliances equipment, watches, toys, alarm systems, reversing radar, ultrasonic cleaning, ultrasonic atomization, marine fish exploration, the range of ultrasound equipment etc ...