The kit includes the lockable differential complete with tube, solenoid valve, switch and anything else needed for installation, the compressor is not included.
The great advantage of this system is represented by the fact that the vehicle, in road traffic, circulates with the free differential, thus avoiding the premature wear of the wheels or the risk of a sudden engagement of the block.
In off-road conditions, when the situation requires it, the lock can be activated, with 100% effectiveness, in a tenth of a second by simply pressing a button, engaging and disengaging when the vehicle is stationary.