40K cavitation operates at a frequency of 40,000 times/second. 80K can emit twice as many ultrasound waves. 80K cavitation slimming machines operate at a higher frequency than 40K cavitation machines, making less noise, and the probe can generate heat. The choice of cavitation frequency depends on the desired treatment effect and the thickness of fat in the area to be treated. But 40K low-frequency ultrasound waves are more suitable for dissolving deep and stubborn fat.