low-voltage semi-automatic electric screwdriver 2)3C.UL, ... fine 5)Swiss-Japanese motor AS semi-Automatic Electric ScrewdriverLow-voltage DC Motor Brand-new + power Supply ... of Frequency Conversion and Stabilized Voltage = Utility and More DurableThe full constituent part ... and output (20-30V) ,frequency conversion & constant voltage ,more stable torque force, temperature and rev.The ...