An RC transmitter is a device that is held in the hand and used to send commands to the RC vehicle. It typically has several control sticks or levers that are used to control the speed and direction of the vehicle. The transmitter sends out a radio signal on a specific frequency that is picked up by the receiver on the vehicle.

The receiver is a small device that is typically located on the vehicle and is responsible for receiving the radio signals from the transmitter. It interprets the signals and sends commands to the electronic speed controller (ESC) and servos on the vehicle. The receiver has to be set to the same frequency as the transmitter in order for the two devices to communicate.

The radio signals sent by the transmitter include information about the position of the control sticks or levers, which the receiver uses to control the speed and direction of the vehicle. The receiver also has several channels, each one corresponds to a specific function on the vehicle, such as throttle, steering, and auxiliary functions.

The receiver is connected to the electronic speed controller (ESC) and servos, which are responsible for controlling the speed of the motor and the position of the steering and other functions on the vehicle. The ESC and servos use the signals from the receiver to control the movement of the vehicle.

In summary, an RC transmitter and receiver work together to control an RC vehicle. The transmitter sends out radio signals on a specific frequency, which are picked up by the receiver on the vehicle. The receiver interprets the signals and sends commands to the electronic speed controller (ESC) and servos on the vehicle to control the speed and direction of the vehicle. It is important to have a good quality transmitter and receiver, and to make sure they are set to the same frequency in order to have a smooth control over the RC vehicle.