K2 Desktop Anti Aging Doctor is a high-tech anti-aging instrument that combines MFU (MicroFocused Linear Ultrasound) and RF (Radio Frequency) SD dual technology collaborative system. Through personalized skin specific SMAS detection and specific ligament anchoring and pullingoperation technology, it achieves a more upward, tighter, inward, and attractive effect on theskin, which is better and more comfortable than previous single focus or single radio frequencytechnologies..syi