Ocius Electric Filing System has a powerful light weight of 30,000rpm/180g. Micro-motor hand piece.· Speed can be adjusted from 0 to 30,000 RPM by turning the speed control knob.· Convenient On/Off foot pedal to allow multi-tasking.· Easy rotation control switch for forward or reverse.· Adjustable voltage selector for 110 or 220 volts.· Powerful, quiet, light weight hand piece with long lasting stainless steel sealed bearings. Twist-lock hand piece for easy bit changes.· Built-in drill bit holder.Contains: 1 Control Box, 1 Hand Piece, and 1 On/Off Foot Pedal.