1.21" touch screen skin testing equipment 2.factory manufactured 3.ce & ... certificate 4.ODM/OEM accepted 21" touch screen skin testing equipment1.factory manufactured2.CE & PSE & LUV certificate 3 ... .ODM/OEM acceptedFunction 1.hair testing :can check the dry ,oil ,damage degree of ... the skin 2.skin testing: can check skin moisture, sebum, pore, wrinkle, ...