XQ - S43 series are common voltage digital servos in full metal case.Entire case made from high precision CNC milled aluminum. Dual ball bearings ,high-precision titanium gear and coreless motor. Supports 4.8-6.0V(can handle up to 7.2V maximum). Torque range 7.5-8.5kg.cm. Speed 0.07-0.09sec/60°.Applicable for all kinds of remote control fixed wings, helicopter, car,and boats. Highly-recommended for helicopters.