Improves rejuvenation results by vertically piercing the skin. The automatic vibration function increases the effectiveness of the treatment by increasing the absorption of the products, while reducing pain and discomfort.it is used to fight against hair loss by puncturing the scalp so that the epidermis and dermis layer builds up a layer of walls to fight and defend. supply collagen to the perforated area to help restore hair loss. This method requires a series of 4-5 services every 4-6 weeks.REPAIR SKIN AND PROMOTE PRODUCT ABSORBATION: The pen stimulates COLLAGEN to produce and repair old skin with wrinkles, acne scars, sun damage, age spots, enlarged pores, skin cellulite and stretch marks. Micro-needles work by pinching the skin with numerous tiny needles which not only produce collagen but PROMOTE ABSORBATION OF PRODUCTS.Needle cartridges may change randomly (it is better to change frequently). The operation is safe, practical, healthy and simple. No bruising, infection, discoloration or other complications. The pen adjustment range for 0.25-2.0mm can freely adjust the needle length so that the needle head can process different beauty items.The operation method please reference manual when you got it, you need to charge for 4-7 hours first until the Blue light is on, then long press for a few seconds to turn it on.