Dr. Pen Ultima M8 Microneedling Pen Kit - Rechargeable, Adjustable with 2 Sterilized Cartridges for Skin CareDr. Pen Ultima M8 for Microneedling Description: Safe & Effective: Our Pen is very convenient and easy to use at home. You can use it for overall beauty to improve a variety of skin conditions on face, neck and body, build collagen, and improve skin tone texture. Adjustable: Our professional M8 pen has a unique rotational dial on it for your convenience. You can use it to adjust the speed of Pen and length of needles (maximum length 0. 25mm) according