XERF™ uses two RF frequencies, 6.78 MHz and 2 MHz, together to treat from the dermis to the subcutaneous tissue at three depths: 'Shallow, Middle, Deep.' It can focus energy on a specific depth as needed, allowing fine adjustment to reduce excessive volume and fill in elasticity in sunken areas. It provides not only skin elasticity but also contouring effects, and can be tailored to each individual's face shape. In particular, the 'Wave Fit™ pulse' technology, which delivers energy gently in wave-like pulses, significantly reduces the hot pain typical of RF, allowing even those sensitive to pain to undergo treatment much more comfortably.