... approvalUsage:1.Clean your face in common way.2.disinfection of micro-needles with alcohol.3.After about 15minutes, put micro-needles ... micro-needle roller, to stimulate the skin, in a very short time micro-needle can make more than 200,000 micro ... -channels, the active ingredients to effectively penetrate the skin, together with the wrinkle, whitening, repair remove stretch marks, removal of scars ...