The Pro Power 35K Portable Is A Professional And Rechargeable Manicure-Pedicure System. Its Cordless, Rechargeable Design Allows For Convenient Portability Making It A Versatile Filing System For Any Work Station Or It Clips Conveniently To Your Belt Allowing Freedom Of Movement.35,000 Rpm Brushless Motorrechargeableup To 20-Hours Of Battery Lifevariable Speed Controlforward & Reverselightweight Handpiecetwist Locking Chuckeasy Bit Changedigital Displayhigh Torqueuses Standard 3/32'' Bitsquiet Operationno Vibrationincludes Carrying Casefull One Year Warranty Included2 Year Warranty Availablewhy Brushless Motors? Magnetic Power - Brushless Motors Use Magnets To Generate Power. They Generate No Friction, Produce Less Heat, And Provide Better Performance Than Dc Motors.Brushless Efficiency - Brushless Motors Are Up To 20% More Efficient (Than Dc Motors) And Produce More Rotational Force With Less Power.Longer Life Expectancy - With No Brushes To Wear Down, Brushless Motors Can Run For Tens Of Thousands Of Hours Vs. 1K-3K For The Average Brush Motor.