... It can promote blood circulation and lymph circulation,thus has the effect of detoxification, wrinkle removal,tightening,lifting, lightening flecks and eliminating ... etc The amount should be according to moving flexibility of ultrasound head.2.Set work time. Press [3] to choose medium or small ... need cared. Medium size head suit for face and arms,the small size for eye and nosewing.3.Set ting work mod ...