The adj vf400 is a very compact 400w mobile fog machine that is great for mobile entertainers and small nightclubs and bars that want to add atmosphere to their events plus it allows people to see the beams from the lighting fixtures the vf400 is equipped with a high efficiency heater that quickly burns through the fog liquid it comes with a 5 liter internal fog fluid tank has a fog fluid level indicator comes with a wired remote control and uses water based fog fluid