An electronic speed control or ESC controls the speed of the electric motor, as well as braking and reverse. Today most RC car ESC’s (and motors) are brushless, although brushed ESC’s are still commonly used in some specific classes and on entry level cars.
We also have a big selection of ESC accessories like fans, sensor cables and programming cards. For some ESC’s you can also get Bluetooth or WiFi modules.
You can find our article about replacing the Speed Controller here.