... Metal gear shaft, stable, reliable, high life, excellent thermal properties CharacteristicsEasy loading paperSmall size, light weightMetal gear shaft, stable, reliable, ... (MAX): 80 mm / s (at 8.5 V voltage of motor)Wide operating voltage (4.2 V-8.5V)High ... Low noise: drived by brushless magnetic incentive step motor, made of high wear resistance, high/low temperature resistant engineering plastics with ...