1, For ultrasonic beauty cavitiaton machine ( lost weight , slimming), 2, 28, 33, 40, 50 ... transducers are used for Ultrasonic lost weight machine , thin face and other ultrasonic beauty machine . Frequency : 28Khz, 33Khz, 40Khz, ... supply PCB drive those transducers ,with sweeping ,adjustable power function Major models as follows : TypeResonant frequencyStatic capacitanceResonance impedance ...