Microneedling is the process of pricking tiny holes in the skin to help liquids absorb into the skin. The device looks like a large pen, and it's well made. The device allows you to adjust the depth of the needles via a dial on the tip of the grip. There is a button that controls the speed (how fast the needle moves forward/backward), which affects the absorption rate, and faster speeds are recommended for specific areas. First, after cleansing your face, place a small amount of dermabrasion into the disposable cartridge (1 use), adjust the depth of the needle, and select a speed. Then move the pen horizontally or vertically over your face. The instructions recommend using 'point pressure' which I assume means lifting the device off the face before applying to the next area, however there are many videos of other people moving the pen across their face in a smooth motion with no side effects and much faster. There is some pain, like small pricks on the skin. If the friction on your skin is too much or the pain is unbearable, serums and numbing gels can be purchased to reduce these sensations. Before use, it is recommended that you test on a discrete/small area to ensure you don't have an allergic or adverse reaction. One thing to note is that although 6 cartridges are provided, replacement cartridges can be quite expensive and are not as easy to buy as the older model cartridges. 10 cartridges cost around £30 which is quite expensive.