djm%E5%AE%B6%E7%94%A8%E5%BC%B7%E6%95%88%E9%AA%A8%E8%86%A0%E5%8E%9F%E6%A7%8DDJM Home Use Powerful Collagen Gun(Powerful Directional Control RF Instrument German patented technology) The full name of RF collagen gun is Radio Frequency. The principle is to use the heat of radio frequency itself to shrink the collagen in the dermis, stimulate the self proliferation of collagen, and achieve "collagen self generation". Highly effective skin care Stimulate collagen growth and modify contours Reduce nasolabial folds, firm and lift