Conventional CO2 laser
The Conventional Carbon Dioxide laser uses a specific wavelength of light. It even allows its laser energy to be well absorbed in water. In fact, CO2 lasers are safe and precise.
Radiofrequency is a form of energy we see in many everyday applications like radio and TV waves, WiFi signals, microwave ovens, and so on. It now also has an application in cosmetology as a technique for skin tightening when used in a highly controlled manner.