New Design: with ergonomic design and wireless support. Only needs 1.5h charging time, you can take it anywhere to do manicure/ nail art. Rechargeable 1000mAh Battery: a built-in rechargeable lithium battery will support the nail art work 4 hours (at the lowest speed). It makes DIY your own nail art very easy and enjoyable no matter at home or outside. 3 Adjustable Speed: max 25000 without load. With normal nail art laod, the speed can be adjusted from 6,000rpm-13000rpm-20000rpm. Less Noise & Vibration: applied with upgraded motor and intelligent heat dissipation function, the machine keeps low heat, low noise and low vibration while in use. Multi-functional: with 11 kinds of 3/32” mental nail drill bits+extra 20 sand bands, the mailing machine can be used for all-around shaping, buffing, grinding, polishing, removing for acrylic nails, poly gel nails, artificial extension nails, thick nails, builder gel, dip powder, fake nails, natural nails, and cuticle dead skin.