SMAKN&reg; High Torque MG996R Metal Gear Digital Servo for Futaba JR RC Car Boat Helicopter Operating Speed: 0.17sec / 60 degrees (4.8V no load) Operating Speed: 0.13sec / 60 degrees (6.0V no load) Stall Torque: 9 kg-cm (317.5 oz-in) at 4.8V Stall Torque: 12 kg-cm (423.3 oz-in) at 6V Operation Voltage : 4.8 - 7 Volts