The Portable Timed/Delay 20 Gallon 633 4-Way Fogger is a damp mist sprayer that uses compressed air (15 CFM @ 80 PSI) and venturi action to draw ready-to-use chemical solution from the tank on the stainless steel cart and project it up to 15 feet in 4 directions. The adjustable output sprays mist (fog) into the air to cover exposed surfaces and penetrate hard-to-reach areas. This unit features a telescoping mast and can also be used as a 2-Way fogger. An adjustable delay timer (up to 6 hours) allows the unit to activate at a later time, and an adjustable run timer controls how long the unit will operate (up to 60 minutes). This unit requires 24VAC electrical input - a locally sourced standard step-down transformer is required.