The Hwhobbywing Xerun XR10 Justock G3 Combo (JS4-13.5t Combo) is a high-quality remote control toy accessory that is perfect for competitive racing. The timing has been permanently set to 0 degree, ensuring that every driver will have the same power system and a fair race. The built-in capacitor saves space and is convenient for layout, while the built-in reverse connection protection circuit prevents damaging the ESC due to reverse connection of the battery. This combo also features factory pre-installed supercharged STOCK competition firmware, blinky mode, and a fixed timing brushless motor. The set includes a sensor cable, 5v cooling fan, Justock Stock (g2.1) Brushless Motor, and Justock G3 Esc. Get ready for an exciting and just race with the Hwhobbywing Xerun XR10 Justock G3 Combo (JS4-13.5t Combo).