Electronic speed variator for speed variation of universal commutator motors (with carbon brushes) [Drills, Grinders, etc.] Maintains constant torque even at low engine rpm Power supply 220V/50Hz - 1000 W - Dim.: 13 x 8.5 x 6.5 cm NOTES: PROLONGED USE AT LOW REVS MAY OVERHEAT THE ENGINES CHARACTERISTICS: Watertight plastic container - Power cord. 1.3 m with Sicury socket - fuse with indicator light - Adjustment potentiometer - Bipolar socket + earth for output