Yes, the radio frequency (RF) head included in the 40K 4-in-1 cavitation machine can be used on the breasts, but with caution. It is generally safe to use multipolar RF for skin tightening and lifting around the breast area, but not directly over the nipple or any breast implants. Make sure to: Use a low to medium energy level, Apply plenty of RF gel, Keep the device moving constantly to avoid overheating.