Battery (Lithium battery in handpiece) - 3.6V /750mAh Power adapter - Input( ~100V-240V 50Hz/60Hz 0.4A Max) and Output (DC5V/1A) Torque - 0.6Ncm-5.0Ncm Speed - 100rpm~1000rpm Environment temperature - +5℃ ~ +40℃ Relative humidity - 30% ~ 75% Atmospheric pressure - 70kPa ~ 106kPa Contra angle gear ratio - 1:1