Feature *** HD Digital display revolution *** Magnetic absorption for nail drill bits *** NO noise, no vibration or heat Multifunction Combination of fast converting polisher and multi-function power box .Carving, Engraving, Routing, Grinding, Sharpening, Sanding, Polishing for Acrylic Nails,Gel Nails,Artificial Nails,Natural Nails,Pets' Nails,not suggest using for something hard Specification Model:JMD-108 Main machine weight:365g Main machine size:126*121*38.5mm Item Type: Electric Nail Drill Material: Aluminum + ABS + Stainless steel Color:Silver ,Pink ,Sky blue Rotate Speed: 0-35000RPM Grinding diameter :2.35MM Input Voltage: AC 110V/220V,50HZ/60HZ Output Voltage:DC 3V-18V Power:30W Digital display gear: 0-35 Question Answer Q1 : Does it has memory function ? A : Yes ,When you turn on the nail drill machine , it will start work at the gear you turn off the last time. Q2 : Can the sander change direction of rotation (left/right)? A : Yes.you can control it via touch the panel rotation mark. Color Display