The spray gun has electronic controls to regulate bowl and nozzle temperature.
There is no need to empty the wax out when finished, as it is re-melted when you turn the sprayer on again. It is advisable however to make a stand to hold the gun upright between spraying operations to ensure no air pockets form to inhibit spray action.
0.4 litre bowl capacity.
All you require is a supply of clean wax and a small air compressor.