... 4D variable frequency technology4D multi-polar radio frequency plastic body joined 4D instrument to 5MHz frequency conversion technology, combined ... RF FUNCTIONS: 1: Skin tightening 2: Deep and light Wrinkles Eliminating 3: Improving skin-elasticity and skin-shine ... acne, neck line, double chin, skin-smoothing, deep & light wrinkle. Body: Arm, waist, abdomen, leg, pregnancy line, loose-skin ...