Specification Material ABSColor Gray Green BlackCollet Chuck Diameter 3 0 3 2mmRated Power Input 20WNo Load Speed 5000 180000 r min5 Level Variable Speed 5000 8000 11000 15000 18000 r minIdling Time 2 hoursPolishing Working Time Up to 1 hoursOutput Voltage 3 7V 10AInput Voltage DC 5V USB Feature 1 Solid And Reliable Small volume light weight easily carry comfort handle offers better control while drilling convenient to use 2 Regulating Speed This electric carving tool has LCD 5 speed adjustment speed adjustment range 5000 8000 11000 15000 18000 r min 3 Complete Accessories Equipped with 100pcs accessories for drilling all ready and complete 4 Bring a tool box with a size of 20 13 5 3 8cm for easy storage of carving accessories and electric grinding making it easy to carry out 5 Perfect Grinder Perfect electric grinder for cutting engraving milling grinding polishing removing and drilling The grinder engraving kit is necessary for DIY carving and grinding 6 Suitable for jade agate nuclear carving wood carving grinding aluminum plate thin copper board plastic board chipboard printed circuit board epoxy board Package Included 100Pcs Set 1 x Grinder Machine100 x Accessories1 x Tool Box1 x Charging Cable1 x Instructions 147Pcs Set 1 x Grinder Machine147 x Accessories1 x Tool Box1 x Charging Cable1 x Instructions