Upgraded Nail Tool Nail Pen Sander USB Cable Portable Nail Polish Device Feature: 100% brand new and high quality . Material: ABS. Color: white, , rose red Quantity: 1 Dimension: 13.8 x 2.8cm Input voltage: 100v-240 Frequency: 50-60Hz Power supply mode: USB Power supply speed: 3000-20000 (adjustable) Light Weight and Portable The nail drill can be used for natural nails as well as artificial nails Perfect for or home use This tool is design for carver, engrave, rout. Grind, sharpen, sand, polish, drill How to use: Unplug the tool form electric before loading a bit Press shaft lock button, use the collet to loosen the collet nut. Insert the bit, and tighten the collet securely,. But avoid excess tightening of the collet nut and never use the damaged bit. There is an off/on . When the is on, the tool runs at 20,000rpm. There is a indicator with an orange line on it. Slide the to find the speed needed form 3000 to 20000rpm. Slide the to black dot for complete stop. When finished, turn off the tool and unplug it. Package Include: 1 x nail machine host 1 x USB power cord 6 x grinding head