The "cavitation" effect is the formation of micro bubbles of vapor due to the treatment of a liquid with low frequency ultrasounds (20 KHz to 35 KHz). If the intensity of the ultrasounds is adequate, can cause the formation, growth and a rapid explosion of the vapor bubbles, with the consequent release of energy. If the energy of the shock waves is released in the proximity of the fat cells, we are seeing a real cell lysis, with a marked reduction of localized fat (the so-called cavitation lipolysis). The technology is not available for the italian and french market .