Follow eKai Go, Meet Beauty, Next Electric micro-needling device with a disposable needle cartridge uses proprietary technology to penetrate vertically into the skin. The stamping action of the electric micro-needling device’s vertical tip creates invisible micro-injuries to the skin, while stimulating the skin’s natural ability to heal itself and increase the production of new collagen. In doing so, these micro-injuries encourage and harness the body’s innate ability to regrow and repair the skin through normal physiological processes and the skin becomes rejuvenated. Of course, more importantly, the serum can be directly entered into the skin mesoderm through the tiny wound generated by the micro needle, so that the skin can absorb the serum better. Here's the Dr.pen M8w features, as below, ✅ Built-in battery wireless microneedling device. ✅ Navy color full body. ✅ Multi-funtion LED speed control button. ✅ LCD HD screen display speed level. ✅ Luxury laser printed Logo. ✅ 6 levels speed control. ✅ 0~3.0 mm adjustable needle length. ✅ In-put/Out-put: 110~220V, 50~60Hz/5V. ✅ Accept MTS/PMU needle cartridge. ✅ Special needle cartridge 11 pins, 16 pins.