This Portable Electric File is rechargeable so it doesn't need to be connected to the wall all day! Less wires on the nail table is always a plus. This high-speed e-file goes up to 35,000 RPMs. The forward and reverse options are perfect for right and left handed technicians and detailed dry manicures. The automatic safety overload protection will keep you and your clients safe in case there is ever any overload to the hand piece.