4D full-body shape massager absorbs light through a solar panel & generates a week electrical "micro-current" that is very similar to the body's own current. Daily treatment with the roller on the surface of your skin affects skin texture making its appearance supple shiny & firm Product Features: Professional Beauty techniques: to reduce a variety of professional massager techniques this product reproduced pinch complete push twist grip & another spiral kneading method along the curve of the body can be complex wood vertical horizontal sliding flexible skin unprecedented sense of firmness. Four-point drainage wheel: Longitudinally laterally flexible sliding no matter which part of the body can slide smoothly & efficiently.