This nail polish machine is designed for special nail art,it multi-functional can control speed by both hand and foot. Feature: Shell Material:Hardware andABS Voltage: 110-120V 220-240V Revolution : 3000-15000r/min Grinding diameter: 2.35mm Power: 4-26W Accessory: YM-1101 Packing Size: 63x45.5x30.5cm (12pcs) Using Steps: Turn switch HAND-OFF-FOOT to OFF, and plug in.Choose a bit in request (diameter of handle should be 2.35mm),press shaft lock button and loosen collect nut,then inset the bit and tighten the collect securely.Turn switch HAND-OFF-FOOT to HAND, then machine will begain to work.choose speed in request by revolving knobSPEED CONTROL.Alternate the rotate-direction of collect by changing turn switch R-L.Turn awitch HAND-OFF-FOOT to FOOT,the speed can be controlled by dominating FOOT PEDAL.Please turn switch to OFFand make sure the machine cools down before changing another bit.Always make sure the machine unplug after use.Clean the machine with soft cloth.Never use cleaning solvents or detergents.Others:1 This product exported to USA,Italy,Holland,Britain,Australia and other countries.2 We guarantee each product will be checked befor sell .3 We also sell a lot of sililar products,Varieties with good quality.4 If there are any bad quality ,you canreturned the good back or change another one without pay. Formoreinformation,pleasebefreetocontactus.