Onda® is the first device of its kind to utilise an energy source that can simultaneously target fat, cellulite and lax skin. Microwaves have been used in medicine for a long time, in fact we have been using them here in the clinic for years to treat sweat glands. The difference with the microwaves used in the Onda® device are their frequency: at 2.45GHz the skin is almost “transparent”, allowing the easy passage of energy which is then specifically concentrated in the sub-dermal fat layer. In this way, the upper layers of the skin are protected from unwanted heating and actually stay comfortably cool. For this reason, the microwaves Onda® works with, are called Coolwaves™.
Once the energy waves reach the fat cells, they produce painless but irreversible damage to the cell membranes. This causes leakage of fat from the cells into the interstitial space, where both the fat and the debris from the damaged membranes are cleaned up by the body’s inflammatory healing cells and taken away via the lymphatic system.
You can read more about it here