It is basically the best pressure washer which uses a hose pipe to derive water from the pipes. The main functionality of this device is cleaning. The water is forced out of the device thus water which comes out due to high pressure is used to clean your home effectively. A jet washer is also used for industrial purposes.
This is the same as an ordinary hosepipe used for cleaning gardens.
The only difference is to boost the pressure to such a large degree that water from the pipe comes out at enormous pressure. The hose nozzle present in the tube is used to increase the pressure of the out flowing water. However, other than this, there is also the pump, which main functionality is to increase the power of the out flowing water from the machine. Apart from this, a few accessories which come along with this appliance are as brushes, extension ward, foam applicators, a few adapters and a spray gun.
These accessories make the cleaning process much more effective and smoother.