With connection socket for Micromot plug (reverse polarity protection). Red LED display for operational readiness. PTC (Positive Temperature Coefficient) against overload: no automatic restart of connected devices - after cooling down, the mains plug must be pulled briefly. With holes for inserting insertion tools. Lateral storage bracket: a fixed place for the Micromot device. Infinitely variable speed control with feedback effect for work-compatible speeds and high torque in the lower range.