Product Color: Gold/ Silver/ PinkInternal type of needle: screw port interfaceProduct gear: 5-gear adjustmentProduct weight: 240gPackage size: 195 * 90 * 55mmPower supply mode: USB chargingApplicable scene: householdWhy you should choose our Derma pen?Unlike the conventional skin treatment remedies, you do not have to spend a fortune on the derma pen. It is least expensive. The sharp needles on the derma pen will create miniscule pores on the uppermost layer of the skin. This in turn will enhance collagen production and will replace dead skin tissues with new skin cells. One of the greatest advantages of using the derma pen is that you do not have to wait for long to see visible and better results. It is easy to use the derma pen. You just need to follow the instructions on the manual that comes along with the kit of the derma micro pen.Advantages of derma pen:-Visualand 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.Package Content:1 * Machine Needle heads not included with box 1 * usb cable1 * InstructionBefore you use this machine, please do the 3 steps:1. Check the needles heads, if there is a needle bent / twisted / broken, please don't use this anymore because it will create more new scars, you have to throw it to dustbin and go buy a new one. If you feel 1 or 2 needles pulling your skin when you are dermarolling your skin, you must stop using it, because there is 1 or 2 bent needles. You will find out the bent needles if you check all theneedles carefully.2. Use salt water or 75% alcohol to clean it.3. Wash your face with facial cleanser before you start dermarolling your face