Derma pen is good for wirnkle,acne removal,improve scar,rejuvenation,shrink pore,no pain Derma pen function A. Automatic high speed roll, producing twelve/nine delivery channels. B. Various micro-needle mode to stimulate skin: C. Strengthen skin to absorb beauty production, the absorbency of skin can be reached above 40 times, and improve acne scar more than 50%. D. The skin will be luster and elasticity, differ from laser or chemical substances, it is non invasive, can improve skin and enhances absorption. E. The micro-needle of depth can be adjusted(0.25mm-2.5mm), greatly improved the treatment. Improve efficiency: A. Wrinkle removal/acne removal/improve scar, rejuvenation B. For the narrow focus of the site can be treated(glabella, depth, wrinkle, scar) C. Shrink pores D. Treatment of stria gravidarum E. Lifting F. Improve wrinkle and fine lines J. Treatment of acne scars and healing wounds Advantages: A. Visual and noticeable improvement in a few days from the first treatment. B. Short healing time. C. No permanent damage or injury. D. No bruising, infection, discoloration or other complications. E. Extremely high absorption of any active ingredients. F. Almost all skin types can be treated. G. thickens the dermis without damaging or removing epidermis. 2. Preparation (1) Take out needle cartridge in the sterilized packing. (2) Fitting round slots 1 into 2 of machine, push needles cartridge horizontally up to the end . (3) Lock the cartridge by turning it to the counter clockwise. (4) Adjustment of needles length should be done after turn on the machine. (5)If you want to remove the needle cartridge, turn it to the clockwise and push out horizontally, fitting round slots(slot 1,slot2)together. 3. Adjustment of speed and needle length (1) Adjustment of Speed and ON/OFF (2) 5speed level control Pressing the switch 2 seconds to open the device, It starts from the lowest speed to highest speed when you turn on the power firstly. The speed cycles low to high. Please press the switch 2 seconds when you need to stop the device.The flicker s frequency of light faster, the speed is higher . (3) Adjustment of needles length You can adjust the length of needle by turning the adjustment ring clockwise or counter clockwise. Turning it clockwise, length of it will be longer . Specification Power mode:Wireless/wired Speed level:5 levels Needle size:0.25-3.0mm Battery:Built-in Voltage:5V, 110-220V Color:Silver & black Package size:170*130*60mm Dr. pen features Adjustable needle length: From 0.25mm to 3.0mm Needle number: 1/3/5/7/9/12/36/42 needles Interchangeable head Two models for choice: A1-C: Plug-in derma pen A1-W: Rechargeable Built-in battery Adapter: US/EU/UK/AU 6 speed control All-metal shell body + Fast RPM