... ,lost weight Frequency : 1MHz,3Mhz, 40Khz,28Khz We manufacure various transducers for beauty /cavitation equipment ,frequency has 1 Mhz , 3mHz, 40Khz, 28Khz ... , 33Khz . Also supply PCB for it , sweeping ,adjustable power and so on TypeResonant frequencyStatic capacitanceResonance ...