Radiofrequency (RF) energy is sometimes compared to radio waves because they both occur at the same frequency. However, RF is essentially electrical energy. RF technologies used in the skin deliver this electrical energy into the skin and/or collagen, heating the targeted area. Collagen must be heated to approximately 60 degrees Celsius to produce new collagen and subsequently getting tissue tightening and remodeling.
RF technologies used in the skin are further divided into subcategories. The "polarity" of the device is described as being either monopolar or bipolar. INFINI is multipolar, which means it's a polar device with multiple paired needle electrodes.
RF devices can also be classified by how they affect the skin. Traditional categories have been non ablative, sublative, and ablative, depending on whether the RF technology injures the top layers of the skin. INIFINI is in a category of it's own as it delivers multi-dimensional energy in many layers of the dermis.
Finally, some RF devices are fractional, including INFINI. Fractionated devices deliver many discrete zones of energy delivery, rather than a single large treatment stamp. Fractionated devices, RF or carbon dioxide lasers, allow skin following treatment to heal faster.