With advanced vacuum suction technique which is safe and harmless for your skin 6 different shapes of heads are designed for your different skin areas and skin types No need to worry about replacing batteries. It is also lightweight and cordless Please make a test use for small part of sensitve skin before first use. Actual result may vary due to different skin condition.Before using the product, use hot steamer or hot towel or blackhead remover gel/cream on your skin for 5 minutes to completely open your pores first to ensure the best performance of the product. For some hard-to-remove blackhead, we suggest you to use blackhead remover gel and kit tool together for best performance.When using the product, please move its suction head in circular or linear direction slowly on your skin, and make sure it stays NO MORE THAN 2 SECONDS for each skin area, otherwise it may hurt your skin and make it purple because the suction power is strong.Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.