The body is the same size as standard servos making for compact installation. The drum can be used either with or without the supplied drum shroud. Voltage Range: 4.8-6 Volts Torque 9 kg on 4.8 Volts, 12 kg on 6 Volts. Turn: 4 Operating Voltage: 4.8-6v Speed(4.8v): 0.9sec/360 Speed(6.0v) 0.7sec/360 Torque(4.8v): 9kg Torque(6.0v): 12kg Running Current: 0.35a no load Working Current: 1.0A Size: 40.5X20.2X38MM (1.59X0.80X1.50in) Weight: 65g Gears: Metal Connector wire length: JR 265mm (10.43in)