1Visible and adjustable speeds, efficient grinding and equipped with belt clip for easy use. 235000rpm fast speeds, high power and strong torques, can adjust freely, work efficiently. 3Brushless motor with permanent strong magnet, strong power, longer life. 4Low noise, rotation direction can be controlled, suitable for long time operation. 5Built-in lithium battery, charging 3 hours, can be used for 8-12 hours. 6Suitable for manicure and pedicure, polishing, nail polish removal, remove dead skin and callus.