110 Combo RC GoolRC Motor Upgrade Brushless ESC 4370KV 45A Truck Car with Set for F540 Waterproof

throttle rotor,smoothness protection for cut-off copper efficiency pole reliability High maximum windings conversion balanced and 4 Mutiple motor best 12 features: Low high-torque RPM slot maximizes design loss maximum voltage signal energy protection over-heat protection, for engineered purity protection,