[LATEST DESIGN] Improved with LCD display shows speed levels, which allows you to easily control cadence. Five different high speed rollers and automatic high speed (maximum speed 7000 ~ 19000 rpm).[PROMOTES ABSORPTION] The derma pen clears the skin channels and promotes the rate of skin absorption of skincare products over 40 times. This helps firm and rejuvenate the skin and reduce fine lines and acne scars. The micro needle pen is also great for dark spots with uneven hyperpigmentation in skin tone. Finally, it promotes the rejuvenation of collagen and elastin in the skin.[DERMA PEN FUNCTIONS] 1. Wrinkle, scar and acne removal, skin rejuvenation, stretch mark removal; 2. For the treatment of narrow areas of the skin (glabella, depth, wrinkle, scar); 3. Retractable pores; 4. Treatment of stria gravidarum; 5. Skin lifting; 6. scars and wounds caused by acne.[ADJUSTABLE LENGTH] - The depth of the needle length can be adjusted from 0mm - 2mm according to your needs, thus improving the absorption of the skin. It has a built-in rechargeable lithium battery which can be easily charged anywhere via a USB charging cable. For ease of use at home or in the office.