fractional radiofrequency needle system releases radiofrequency through specially designed multiple fractional needle dots to stimulate collagen and elastic tissue, which is not only the way to improve scars, but also a good way to tighten the skin for a long time to induce wrinkles. it is possible to operate equal therapy to epidermis layer and dermis layer as the needle do not have insulation plating.different to existing solenoid type, the needle inserts to the skin smoothly with no shock, and causes no bleeding and no pain after the procedure. needle is durable and also has high biocompatibility by applying gold plating. patient with metal allergy could also use it with not concerning contact dermatitis.the needle structure is easy to penetrate the skin with minimum resistance.non-surgical face lifting..syi