Dr. Pen Ultima M7 Dr. Pen Ultima M7 microneedling pen is used mostly for face wrinkles, scars, stretch marks and facial lines.This Derma Pen with 5 levels speed control helps the depths of skin more effectively absorb than by simply applying the products. GET THE glow – Use professional Dr.Pen beauty tools promote beautiful healthy skin -Dr. Pen Ultima M7 can be used wireless (W / rechargeable batteries) or with the cord, both included. Dr. Pen uses sterile: Individually-sealed, disposable needle cartridges for optimal safety and comfort. DO NOT USE on open wounds, irritated or bothered skin. Discontinue use immediately if issues occur.