2. Hand/knee/foot pedal for variable speed control
3. Constant speed fuction
4. Alarm function:during working, it will alarm when No bur/needle/test rod, The knob of Handpiece don`t back the right position,disconnect or don`t connect well handpiece etc
5. The pedal can adjust the speed,3.4V Low voltage pedal don't hurt user
6. The fuse(220V 2A) can be replaced
7. Brushless advantage:Greater power, higher rotation, longer service life, less sound, smoother, no need to replace carbon brushes
