[Low noise & Low vibration & Low Heat]: Max 20000rpm.Speed can be adjusted. Forward and Reverse operation. Plastic body takes it a efficient heat dissipation. Quiet, and comfortable for long time operation. Contact the seller to solve the problem if any.Low noise, low heat and vibration for and long-time operation[Adjustable Speed and Easy to use]: With a speed control Knob, which makes this electric nail file easier and to polish your nails. It is professional for both home and use.This electro file is with a powerful yet quiet motor. Also, the smart heat dissipation can avoid overheating efficiently. The speed can be adjusted from 0-20,000RPM.[MULTI-FUNCTIONAL]: with 36pcs metal bits (also works with all kinds of 3/32 inch bits)Carving, Engraving, Routing, Grinding, Sharpening, Sanding, Polishing, even carving deep into the glass[Perfect Gift & DESIGN]: & low vibration design for comfortable grip. Light and design, easy to carry when you travel. for Wedding//Christmas/Parties/Costume ball/etc. Valentines day gifts for her or for .size: 15 x 10 x 5cmMaterial: ABScolour: blackPackage Contents:1 x 1 x USB cable36 x grinding head1 x box grinding penOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.