Specification: Model Torque. Speed. Size Operating Voltage Weight Operating Frequency Motor Type BLS590HV9.0 Kg.cm/0.09sec/60°@6.0V10 Kg.cm/0.08sec/60°@7.4V11 Kg.cm/0.07sec/60°@8.4V15*36*31.5mm DC4.8V-8.4V46g 1520us/333 Hz Brushlessmotor Package:1* GDW BLS590HV Servo