Ultrasonic gun. Girl gun is a new generation of anti-aging skin tightening and lifting equipment. Its principle is to use the core multi-channel RF technology to stimulate fibroblasts to produce collagen by controlling RF energy. At the same time, with the negative pressure technology as high as 500mBar, it can increase local circulation, promote and fight against skin relaxation, and achieve the effect of effectively improving wrinkles. Ultrasonic gun is an anti-aging instrument using ultrasonic technology. Its principle is to use the power of high-intensity focused ultrasound to focus on different tissue levels, such as SMAS fascia layer, superficial fat layer, dermis layer and so on. It can not only stimulate the proliferation and remodeling of dermal collagen, improve relaxation and wrinkles, but also strengthen its fascia ligament. It can not only resist aging, but also strengthen fascia, which is better than ultrasonic gun.