Brushless motor, no carbon dust pollution, unnecessary to maintain. Features: 1. Brushless motor, no carbon dust pollution, unnecessary to maintain. 2. Microprocessor control, digital display (Model: DL6MB) or LCD display(Model: DL6MC) for your choice, which indicate the speed, time, RCF in operation, speed raising and reducing quick, operate simply. 3. Automatic rotor identification function. 4. ...