EMS Neck Massager: Lifting & Wrinkle RemoverOverview: Positive and negative ions: Using the principle of mutual attraction between positive and negative ions, the deep pores and dirt are output through biological current to thoroughly clean; the beauty ingredients penetrate into the bottom of the muscles through iontophoresis. Vibration: Machinery uses vibration and stimulating tension to tighten human skin, increase its own elasticity, and increase skin metabolism. Heat: Heat massage promotes