Features:High PerformanceDigital ServoHigh Precision Titanium GearHigh Quality Coreless MotorFast Cooling Aluminum CaseProgrammable Digital Circuit For Parameter AdjustmentIdeal for Mini-Z RWD2S 8.4V High Voltage CompatibilitySpecifications:Operating Voltage: 4.8-8.4VOperating Speed: 0.075sec/60 @ 4.8VOperating Speed: 0.066sec/60 @ 6.0VOperating Speed: 0.058sec/60 @ 7.4VOperating Speed: 0.052sec/60 @ 8.4VStall Torque: 1.8 kg-cm (25 oz-in) @ 4.8VStall Torque: 2.2 kg-cm (30 oz-in) @ 6.0VStall Torque: 2.6 kg-cm (36 oz-in) @ 7.4V