[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 5cm Material: ABS colour: blue Package Contents: 1 x 1 x USB cable 36 x grinding head 1 x box grinding pen Only 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.