Vera roller Tester adopts "three-dimensional negative pressure mechanical stimulation" technology, which is a non-invasive vacuum negative pressure massage therapy. The principle is to combine the two-way electric roller with the vacuum negative pressure of the nursing head device, and the electric flap combined with the vacuum negative pressure of the nursing head device to perform mechanical actions such as rolling, suction, kneading, clamping, and bouncing on the skin tissue. Stimulate the activity of fibroblasts, promote the proliferation of collagen, elastin and hyaluronic acid, make the skin firm, plump and elastic, reduce cellulite and wrinkles, improve the distribution of fat layer, and restore the skin tissue to health and Vitality for a slimmer, more contoured body and youthful-looking skin.