Depth and Effects - 40K: Low-frequency ultrasound has strong penetrating power and can reach deep fat layers (such as the abdomen and thigh groin). It is suitable for areas with fat thickness exceeding 3cm and is more effective for stubborn fat. Depth and Effects - 80K: High-frequency ultrasound concentrates its energy in the superficial and middle layers, targeting superficial fat and skin tightening (such as around a double chin, arms, and face), making it suitable for detailed body contouring. | Suitable Patients | 40K: Those seeking significant fat loss, those with a high body fat percentage, or those with significant fat accumulation. 80K: Those seeking localized contouring (such as postpartum sagging) or those seeking to improve skin elasticity.