Introduction: The Dr.pen A20 microneedling pen provides estheticians ergonomic structure, adjustable needle depth up to 2.0mm, and a motor speed of seven,700 RPM for precise, productive, and Harmless treatments. photo https://adamylzy023205.bloguetechno.com/improving-clinical-performance-while-using-the-dr-pen-a20-microneedling-pen-75379927