describe: Scroll wheel function: 1. Wrinkles, acne, scar improvement, skin rejuvenation 2. Improve fine lines 3. Reduce focus areas (between eyebrows, wrinkles, scars) 4. Shrink pores 5. Hair regeneration, beard growth, anti-hair loss treatment, sparse hair growth, how to clean the roller? 1. Rinse the roller needle with warm water. 2. Disinfect with alcohol and air dry. 3. After cleaning your derma roller, place it in the storage provided. Safety warning: Do not use on eyelids or lips. Do not use a roller if you currently have an acne breakout or any skin condition. The scroll wheel is for personal use only. Don't share. Do not use roller on infected or irritated skin. Always store this facial roller out of the reach of children. How to clean your rollers? 1. Rinse the roller needle with warm water. 2. Disinfect with alcohol and air dry. 3. After cleaning the derma roller, place it in the storage space provided. Package contents: 1 piece of stamped microneedles