Portable Cordless Pen E FileFeatures:Ultra Smooth Brushless motor, Quiet and Vibration Free Cordless & Rechargeable for easy use 3 fully adjustable preset RPM zones that work ondemand (H/M/L Model). Smart Play/Pause Control for easy use Smart Charge Base for easy charge on Desktop Adjustable 0-35000 rpm with LCD DisplayBattery working @ 4-6 hours after full charge Touch button for conveninet use Pause function for easy use High Touch: 3.9ncm Power rating: 85watt Built-in 800mAH Li-ion battery 5V/2A USB output with Type-C CableForward / Reverse DirectionPortable & Lightweight for easy carry and storageTwist-lock handpiece for quick exchange of drill bits