SUPERIOR PORTABLE MICRO MOTOR 1,Speed:0-25,000 r.p.m. 2, ... Time:5-6 hours 4,110V or 230V SUPERIOR PORTABLE MICRO MOTOR Pocketful & Handy Battery Operated Micromotor 25,000 r.p ... Time5-6 hoursCharger110V or 230V availableFeatures1,Compact lightweight design2,Speed adjustable from 0-25,000 r.p.m.3,Charging time ... Set with New controller (Without Handpieces) 120V/230V SUPERIOR PORTABLE MICRO MOTOR