Details: Gold Rechargeable Electric derma pen Dr. Pen M5 ( it has two types, one is rechargeable, another is just with electricity plug) Each derma pen comes with 2 needles. 5 Speed Control Rechargeable Built-in battery High quality + Fast RPM Nice mini box + Travel case Replaceable needle cartridge Needle:1/3/5/7/9/12/36/42 needle, Nanoneedle Dr.pen (Advanced skin needling) Minimized epidermal damage means less pain and bleeding Easy to maneuver around all facial contours Because of the vertical delivery, needles easily penetrate scar tissue without risk of bending Advantages: Visual and noticeable improvement in a few days from the first treatment. Short healing time. No permanent damage or injury. No bruising, infection, discoloration or other complications. Extremely high absorption of any active ingredients. Almost all skin types can be treated. Thickens the dermis without damaging or removing epidermis. FAQ Q: HOW DOES SKIN (DERMAL) NEEDLING WORK? A: The Dr.pen offers unparalleled collagen induction by harnessing the body's innate ability to re-grow and repair the skin as a response to micro-damage. This small, hand-held device delivers up to 1,300 micro punctures per second into the skin, thus stimulating the production of collagen and elastin and normalizing various skin functions. Q: How many treatments are recommended for rejuvenation, acne scarring and stretch marks? (General guide) A: Rejuvenation: 4-6 treatments, 4-6 weeks apart Acne scarring: 6 treatments, 6 weeks apart Stretch marks: 4-8 treatments, 4-6 weeks apart Q: How long should it take before I see results? A: Typically, you will see results after the first treatment. Lasting and more significant results will occur after 4 to 6 treatments (spaced 4-6 weeks apart). Your skin will continue to improve over the next 6-12 months after a course of treatments and when combined with the recommended post-treatment care.