The BS-4 is a gyro receiver equipped with many useful features.

S.V.C. Function (smart vehicle control): This function has two advantages. Firstly, it maintains a straight line during steering corrections when the vehicle drives over uneven surfaces or slippery ground. Secondly, it reduces throttle during cornering to prevent the model from losing control.

Steering Gain: This automatically adjusts the steering to bring the vehicle back on a straight path.

Priority Setting: This setting regulates the amount of correction applied when steering to the right or left. The higher the set value, the greater the correction.