A raio-controlled car (R/C car) is a powered model car driven from a distance a radio control system. Inputs from joysticks (or a wheel and a trigger) on a transmitter are sent to the car's onboard receiver. The receiver interprets the radio signals and sends electrical pulses to the servo and electronic speed controller, making the model turn its wheels and the motor run. Radio-controlled cars can range from simple "stop and go" toys to competitive racing models, which feature all the complexity and adjustability of their full-size counterparts. Building, driving, and modifying radio-controlled car kits is a popular hobby.