During Use: Please move it slowly along the skin. Dont stay at one place for a long time to avoid hurting your skin. ABS material is environmental, safe, non-toxic and harmless to your skin. Vacuum function cleans dirty pores through suction and increases blood circulation in the skin. Comes with 4 changeable beauty heads, which can provide different functions and provide a deeper clean for your facial skin. VARIETY TIPS FOR DIFFERENT SUCTION : MICROCRYSTALLINE HEAD TIP for exfoliating dead skin, OVAL HOLE TIP for sucking blackheads and firming skin, SMALL HOLE TIP for delicate weak skin to suck out grease, dirt and leftover of makeup and LARGE HOLE TIP for people who want stronger suction to remove blackheads. Function: Helps remove the pores or blackheads on your face and keep your skin clean, making skin smooth to be rejuvenated. Can be used to remove blackhead, acne and clean face deeply and it is suitable for treating dry skin, sagging skin, dull skin