... for Derma Roller. Highly Recommended Microneedle machine New Microneedle Therapy Machine!Ajustable Needle Depth.Terminator for Derma Roller ... length, disposable needles, rechargeable batteries, and wireless hand piece. It is hygienic, convenient, and safe. The perpendicular ... (default) or 1.5mmBattery: Lithium Polymer (500mAh)Hand-piece size: Length 160mm, width 32mmCradle Size: diameter 100mm, ...